Question:
$1.0 \, g$ of Mg is burnt with 0.28 g of $O_2$ in a closed vessel. Which reactant is left in excess and how much ?
$1.0 \, g$ of Mg is burnt with 0.28 g of $O_2$ in a closed vessel. Which reactant is left in excess and how much ?
Updated On: Feb 23, 2024
- Mg, 5.8 g
- Mg, 0.58 g
- $O_2 , 0.24 \, g $
- $O_2 , 2.4 \, g $
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
$2Mg + O_2 \to 2MgO$
48 g of Mg requires 32 g of $O_2$ ?
requires 0.28 g of $O_2$
Mass of magnesium required = $\frac{48 \times 0.28}{32} = 0.42 \, g $
But 1 g of Mg is available. Thus, Mg is the excess reagent.
Excess of Mg left behind $= 1 - 0.42 = 0.58\, g$
48 g of Mg requires 32 g of $O_2$ ?
requires 0.28 g of $O_2$
Mass of magnesium required = $\frac{48 \times 0.28}{32} = 0.42 \, g $
But 1 g of Mg is available. Thus, Mg is the excess reagent.
Excess of Mg left behind $= 1 - 0.42 = 0.58\, g$
Was this answer helpful?
0
0
Top Questions on Some basic concepts of chemistry
- Identify the pair which is not correctly matched:
- AP EAPCET - 2025
- Chemistry
- Some basic concepts of chemistry
- Identify the herbicides from the following:
a) DDT b) Aldrin c) Sodium chlorate d) Nicotine e) Sodium arsenite- AP EAPCET - 2025
- Chemistry
- Some basic concepts of chemistry
Brass alloy is made of which metals?
- NATA - 2025
- Chemistry
- Some basic concepts of chemistry
- Which of the following is an extensive property?
- KEAM - 2025
- Chemistry
- Some basic concepts of chemistry
- A shell in projectile motion explodes while in motion, what is the trajectory of the center of the fragments?
- KEAM - 2025
- Chemistry
- Some basic concepts of chemistry
View More Questions
Questions Asked in KCET exam
- If the number of terms in the binomial expansion of \((2x + 3)^n\) is 22, then the value of \(n\) is:
- KCET - 2025
- Binomial theorem
- A random experiment has five outcomes \(w_1, w_2, w_3, w_4, w_5\). The probabilities of the occurrence of the outcomes \(w_1, w_2, w_4, w_5\) are respectively \( \frac{1}{6}, a, b, \frac{1}{12} \) such that \(12a + 12b - 1 = 0\). Then the probabilities of occurrence of the outcome \(w_3\) is:
- KCET - 2025
- Probability
- If 'a' and 'b' are the order and degree respectively of the differentiable equation \[ \frac{d^2 y}{dx^2} + \left(\frac{dy}{dx}\right)^3 + x^4 = 0, \quad \text{then} \, a - b = \, \_ \_ \]
- KCET - 2025
- Differential equations
- Meera visits only one of the two temples A and B in her locality. Probability that she visits temple A is \( \frac{2}{5} \). If she visits temple A, the probability that she meets her friend is \( \frac{1}{3} \). The probability that she meets her friend, whereas it is \( \frac{2}{7} \) if she visits temple B. Meera met her friend at one of the two temples. The probability that she met her friend at temple B is:
- KCET - 2025
- Probability
In a practical examination, the following pedigree chart was given as a spotter for identification. The students identify the given pedigree chart as
- KCET - 2025
- Genetics
View More Questions
Concepts Used:
Some Basic Concepts of Chemistry
Chemistry is a vast subject and for understanding its significance we can take help of following points:
- Chemistry plays an important role in understanding various subjects like physics, geology and biology.
- Chemistry is a core branch of science that explains us about the various compositional properties and interaction of matter. It also helps to understand various chemical reactions.
- Chemistry is important in order to understand the behaviour of fertilizers, alkenes, acids, salts, dyes, polymers, drugs, soaps and alloys in organic and inorganic chemistry.
- Chemistry plays an important role in various fields like healthcare, industrial, research, food, and farm activities.
Read More: Some Basic Concepts of Chemistry
Classification of Matter
There are two ways of classifying the matter:
(A) Physical Classification:
Matter can exist in three physical states:
- Solids - have definite volume and definite shape
- Liquids - have definite volume but not definite shape.
- Gases - have neither definite volume nor definite shape.
(B) Chemical Classification:
Based upon the composition, matter can be divided into two main types:
- Pure Substances are defined as a single substance (or matter) which cannot be separated by simple physical methods. Pure substances can be further classified as (i) Elements (ii) Compounds
- Mixtures are the combination of two or more elements or compounds which are not chemically combined together and may also be present in any proportion.