Comprehension
The process of accumulation of molecular species at the surface of solid or liquid is called adsorption. It may be physisorption or chemisorption. Low temperature is favorable for physisorption. Amount of gas adsorbed by a solid depends upon nature of gas. Easily liquifiable gases are readily adsorbed. Catalyst increases the rate of reaction. Catalysis may be homogenous or heterogenous Enzymes are biological catalysts. They work at optimum pH and temperature. Solutions are of three types i.e. true solutions, colloids and suspensions. Depending on the interaction between dispersed phase and dispersion medium colloids may be Lyophilic and Lyophobic, Depending on type of particles there may multimolecular, macromolecular and associated colloids. Sol, gel, emulsions are also various types of colloids.
Question: 1
Physical adsorption may become chemisorption as
Physical adsorption may become chemisorption as
Updated On: Apr 26, 2024
- Surface area is increased
- Temperature is increased
- Activation energy is increased
- Amount of adsorbate is increased
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The Correct Option is B
Solution and Explanation
The correct option is (B): Temperature is increased
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Question: 2
An example of homogenous catalysis is:
An example of homogenous catalysis is:
Updated On: Apr 30, 2024
- \(2SO_2(g)\xrightarrow{Pt(s)}2SO_3(g)\)
- \(N_2(g)+3H_2(g)\xrightarrow{Fe(s)}2NH_3(g)\)
- \(4N_3(g)+5O_2(g)\xrightarrow{Pt(s)}4NO(g)+6H_2O(g)\)
- \(2SO_2(g)+O_2(g)\xrightarrow{NO(g)}2SO_3(g)\)
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The Correct Option is D
Solution and Explanation
The correct option is (D): \(2SO_2(g)+O_2(g)\xrightarrow{NO(g)}2SO_3(g)\)
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Question: 3
The characteristics of enzyme catalysis are:
A) Reactions are fastest at pH\(\rightarrow\)9-14
B) Human body temperature being 273K is best stuited
C) Enzyme are highly active in presence of activators
D) One enzyme can cataylse many reactions
E) Poisons interact with active functional groups on enzyme surface
Choose the correct answer from the options given below:
The characteristics of enzyme catalysis are:
A) Reactions are fastest at pH\(\rightarrow\)9-14
B) Human body temperature being 273K is best stuited
C) Enzyme are highly active in presence of activators
D) One enzyme can cataylse many reactions
E) Poisons interact with active functional groups on enzyme surface
Choose the correct answer from the options given below:
A) Reactions are fastest at pH\(\rightarrow\)9-14
B) Human body temperature being 273K is best stuited
C) Enzyme are highly active in presence of activators
D) One enzyme can cataylse many reactions
E) Poisons interact with active functional groups on enzyme surface
Choose the correct answer from the options given below:
Updated On: Apr 26, 2024
- C only
- C and E only
- A and B only
- D and E only
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The Correct Option is B
Solution and Explanation
The correct option is (B): C and E only
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Question: 4
Match List - I with List- II.
List - I List - II (A) Multimolecular colloid (I) Starch sol (B) Macromolecular colloid (II) Gold sol (C) Emulsion (III) Polythene (D) Lyophilic colloid (IV) Vanishing cream
Choose the correct answer from the options given below:
Match List - I with List- II.
Choose the correct answer from the options given below:
| List - I | List - II |
|---|---|
| (A) Multimolecular colloid | (I) Starch sol |
| (B) Macromolecular colloid | (II) Gold sol |
| (C) Emulsion | (III) Polythene |
| (D) Lyophilic colloid | (IV) Vanishing cream |
Choose the correct answer from the options given below:
Updated On: Apr 26, 2024
- A-I, B-II, C-IV, D-III
- А-ІІ, В-IIІ, C-IV, D-I
- А-II, В-II, C-I, D-IV
- A-III, B-II, C-I, D-IV
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The Correct Option is B
Solution and Explanation
The correct option is (B): А-ІІ, В-IIІ, C-IV, D-I
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Question: 5
The correct order of rate of adsorption of different gases by 1g activated charcoal is:
A) \(H_2 < CH_4 < SO_2\)
B) \(H_2 < SO_2 < CH_4\)
C) \(CH_4 < SO_2 < H_2\)
D) \(SO_2 < CH_4 < H_2\)
E) \(SO_2 < H_2 < CH_4\)
Choose the correct answer from the options given below:
The correct order of rate of adsorption of different gases by 1g activated charcoal is:
A) \(H_2 < CH_4 < SO_2\)
B) \(H_2 < SO_2 < CH_4\)
C) \(CH_4 < SO_2 < H_2\)
D) \(SO_2 < CH_4 < H_2\)
E) \(SO_2 < H_2 < CH_4\)
Choose the correct answer from the options given below:
A) \(H_2 < CH_4 < SO_2\)
B) \(H_2 < SO_2 < CH_4\)
C) \(CH_4 < SO_2 < H_2\)
D) \(SO_2 < CH_4 < H_2\)
E) \(SO_2 < H_2 < CH_4\)
Choose the correct answer from the options given below:
Updated On: Apr 26, 2024
- C only
- A only
- B only
- Both D and E
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The Correct Option is B
Solution and Explanation
The correct option is (B): A only
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Top Questions on Reading Comprehension
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THE FAIR ISLE METHOD: Fair Isle knitting is a traditional technique that involves using two or more colours of yarn in a single row to create intricate patterns and designs. This method requires careful tension management to ensure even stitches and prevent puckering. To begin, select your colours and cast on the desired number of stitches. As you knit, alternate between colours every few stitches, carrying the unused yarn along the back of the work. Mastering the Fair Isle technique allows you to create stunning visual effects in garments, accessories, and home textiles.
THE CONTINENTAL STYLE: The Continental knitting style, often referred to as “picking,” involves holding the yarn in the left hand while the right hand manipulates the needles. This method allows for greater speed and efficiency, particularly when working with complex patterns or multiple colours. To practice this style, start by casting on your stitches and using your left hand to tension the yarn. With each stitch, simply “pick” the yarn with your right needle, forming a quick and fluid motion. As you become comfortable with this technique, you may find that your overall knitting speed and comfort improve significantly.
THE SHORT-ROW TECHNIQUE: Short-row knitting is an advanced technique that allows for the creation of shaped garments, such as sleeves and shoulders, without the need for complex shaping. To make a sleeve using this technique, begin by casting on the required number of stitches. Work a portion of the row, then turn your work and return without completing the full row to create the “short rows” that shape the curves of the sleeve. To prevent holes at the turn, wrap the stitch before you turn your work. Repeat this process as needed to achieve the desired shaping and dimension of the sleeve. Once you have shaped the sleeve, you can then sew the side seams to connect the pieces of your garment and finally, complete the edges to ensure a clean finish. This method not only helps shape curves but also adds dimension to your piece, allowing you to enhance fit and style.- AILET BALLB (Hons.) - 2025
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The Story of Coffee
Coffee, a beloved beverage enjoyed by millions around the globe, has a rich and captivating history that spans centuries. The story of coffee begins in the ancient highlands of Ethiopia, where, according to legend, a goat herder named Kaldi discovered the stimulating effects of coffee beans. One day, Kaldi noticed his goats frolicking with unusual energy after eating red berries from a certain tree. Curious, he tried the berries himself and experienced a newfound alertness. This discovery soon spread to monasteries, where monks used it to stay awake during long hours of prayer. From Ethiopia, coffee cultivation and consumption spread to the Arabian Peninsula, particularly in Yemen, where the practice of roasting coffee beans and brewing the drink began to take shape. By the 15th century, coffee had become a popular beverage in the Islamic world, with coffee houses known as ‘qahveh khaneh’ emerging as social hubs for conversation, music, and intellectual exchange. These coffee houses became centers of culture and commerce, influencing the spread of coffee to Turkey and beyond, eventually reaching Europe. In Europe, coffee initially faced resistance from religious authorities who considered it a ‘Muslim drink’ and tried to ban it. However, its popularity persisted, and by the 17th century, coffee houses had sprung up in major European cities, becoming important gathering places for artists, writers, and thinkers. The stimulating effects of coffee were embraced during the Age of Enlightenment, where it was seen as a catalyst for intellectual discussion and innovation. The journey of coffee continued with the establishment of colonial plantations in tropical regions such as the Caribbean, Central and South America, and Southeast Asia. These plantations fuelled the global demand for coffee, transforming it from a regional specialty to a major commodity. The industrial revolution further accelerated coffee production and consumption, leading to innovations in coffee brewing methods and the development of instant coffee. In the modern era, coffee has evolved into a deeply ingrained part of daily life for people worldwide. Its cultural significance spans from the bustling cafes of Paris to the quiet coffee farms of Colombia. Today, coffee remains not only a popular beverage but also a symbol of social interaction, productivity, and enjoyment. Whether sipped slowly over a conversation with friends or grabbed hastily on the way to work, the story of coffee continues to unfold, intertwining with the histories and cultures of countless societies across the globe.- AILET BALLB (Hons.) - 2025
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