List of top Chemistry Questions

Match the following
List – I (Source)             List – II (Carboxylic Acid)
 

SourceCarboxylic Acid
A. VinegarI. HCOOH
B. ButterII. CH3CH2COOH
C. AntsIII. CH3COOH
 IV. CH3CH2CH2COOH

Which of the following exhibits optical isomerism?

Jones reagent is used in which of the following conversions?

What is the major product formed in the reaction given below?

What is the intermediate in the following reaction?
RCN + SnCl$_2$ + HCl $\longrightarrow$ RCHO
Which of the following drug is used on diseased skin surface?
Nucleotides in RNA are joined by which of the following phosphodiester linkages?
A vitamin (X) is water soluble but can be stored in the body. Deficiency of X causes which disease?
A polymer sample contains 5 molecules of molar mass 1000, 3 molecules of molar mass 500 and 2 molecules of molar mass 250. What is its weight average molecular weight (Mw)?
In which of the following reactions phosphine is not formed?
Which of the following is/are correct?
i. Cr$_2$O$_3$ is an acidic oxide
ii. Mo(VI) and W(VI) are more stable than Cr(VI)
iii. All Cu(II) halides are known except iodide
iv. The E$^\circ$ value for Cr$^{3+}$/Cr$^{2+}$ is much more positive than Mn$^{3+}$/Mn$^{2+}$
Identify the macromolecular colloids from the list given below:
I. Synthetic rubber II. Rhombic sulphur III. Sodium stearate
IV. Cellulose V. Enzymes VI. Sodium lauryl sulphate
The sulphide ore of copper containing iron as impurity is removed in the form of a slag by adding an oxide of element X. Identify the element X.
5.0 mL of [AgI] / Ag$^+$ sol is coagulated by the addition of 15 mL of 0.001 M potassium iodide solution. The flocculation value of potassium iodide is
At T(K), the electrode potential of A$^{2+}$(X M)$|$A(s) is –0.2285 V. Given $E^\circ_{A^{2+}/A} = -0.14$ V, the value of X in mol L$^{-1}$ is:
Identify the correct statements about order of reaction:
I) It is equal to the sum of the powers of concentration terms in rate equation
II) It is always a whole number
III) It is determined experimentally
IV) It is not applicable for complex reactions
1.06 g of Na$_2$CO$_3$ (molar mass = 106 g mol$^{-1}$) is dissolved in 500 g water. What is its molality?
Among the following the correct statements are:
I. Carbon black is obtained by burning hydrocarbons in a limited supply of air
II. Carbon black is obtained by burning hydrocarbons in absence of air
III. Coke is obtained by burning coal at high temperatures in a limited supply of air
IV. Coke is obtained by burning coal at high temperatures in absence of air
The correct order of atomic radii of Al, Ga, In, Tl is

The decreasing order of p$K_b$ of the following aromatic amines is

Match the following:

CompoundReaction Type
A. CH2=CH2I. Electrophilic substitution reaction
B. CH3COOCH3II. Nucleophilic substitution reaction
C. C6H6III. Electrophilic addition reaction
D. CH3ClIV. Nucleophilic addition reaction
CsCl crystallizes in a BCC structure. The radii of cation and anion are 165 pm and 182 pm respectively. What is the edge length of the unit cell?
In aqueous solutions, the strongest reducing agents in Group 1 and Group 2 elements of the periodic table respectively are

Match the following (Types of Hydrides vs. Group Elements):

TypeGroup Elements
A. Electron-deficientI. Group 13
B. Electron-richII. Group 15
C. Electron-preciseIII. Group 14
D. InterstitialIV. Group 4 (d-block metals)
At $T$ (K), a gas obeys kinetic gas equation. At this temperature, for a given number of molecules, PV = x. If the number of molecules is doubled at $T$, then the value of PV would be