General Science Chemistry MCQ-3

Consider the following statements.
1 . Mercury is found in liquid state at room temperature.
2 . The property of metals by which they can beaten into thin sheets is called malleability.
3 . The property of metals by which it can be drawn into wires is called ductility.
Which of the statements given above are correct?

(A) 1 and 2
(B) 1 and 3
(C) 2 and 3
(D) 1, 2 and 3

Assertion (A) When H, 2O is added to CaO, heat is liberated.
Reason ® Reaction between CaO and H2O is exothermic.

(A) Both A and R are individually true and R is the correct explanation of A.
(B) Both A and R are individually true, but R is not the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.

The internal resistance of a dry cell is

(A) equal to that of electrolytic cell
(B) smaller than that of electrolytic cell
(C) higher than that of electrolytic cell
(D) zero

MatchColumn I with Column II .
Column I- Column II
A . Modern periodic law 1 . Groups
B . Father of Periodic Table 2 . Moseley
C . Vertical lines in Modern Periodic Table 3 . Periods
D . Horizontal lines in Modern Periodic Table 4 . Mendeleef
Codes
ABCD

(A) 3 4 2 1
(B) 4 1 3 2
(C) 2 4 1 3
(D) 2 1 3 4

The most abundant metal in the earth’s crust is

(A) Si
(B) Fe
(C) Al
(D) Cu

The iron obtained from blast furnace is

(A) soft iron
(B) pig iron
(C) steel
(D) wrought iron

If a system A is in thermal equilibrium with B and B is in thermal equilibrium with C, then A and C are in equilibrium with each other. “This is a statement of”

(A) cyclic rule
(B) zero th law of thermodynamics
(C) first law of thermodynamics
(D) second law of thermodynamics

Which one among the following metals is more reactive than hydrogen?

(A) Mercury
(B) Copper
(C) Silver
(D) Tin

Which one among the following metals is more reactive than hydrogen?

(A) Mercury
(B) Copper
(C) Silver
(D) Tin

Consider the following elements
1 . Cobalt
2 . Phosphorus
3 . Zinc
Which of the above elements are required for maintaining the healthy human body?

(A) 1 and 2
(B) 2 and 3
(C) 1 and 3
(D) 1, 2 and 3

Wrought iron is

(A) iron mixed with 0.1 to 0.2% carbon
(B) cast iron
(C) alloy of steel
(D) impure sulphide mineral

A close bottle containing water at room temperature was taken to the moon and then the lid is opened. The water Will

(A) freeze
(B) boil
(C) decompose into oxygen and hydrogen
(D) not change at ail

To protect iron against corrosion, the durable metal plating on it, is

(A) tin plating
(B) copper plating
(C) zinc plating
(D) nickel plating

Assertion (A) lonisation energy decreases on moving down the group.
Reason (R) Force of attraction between electrons and nucleus decreases on moving down the group.

(A) Both A and R are individually true and R is the correct explanation of A.
(B) Both A and R are individually true, but R is not the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.

Assertion (A) Carbon can form more compounds than any other element.
Reason (R) Carbon can exist in various allotropes.

(A) Both A and ‘R are individually true and R is the correct explanation of A.
(B) Both A and R are individually true, but R is not the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.

Stainless steel contains

(A) Fe + Cr+Ni
(B) Fe + Ni + Cu
(C) Fe + Cr + Cu
(D) Fe + C + Ni

An intensive property in thermodynamics means a property which depends

(A) on the amount of the substance only
(B) on the nature of the substance only
(C) both on the amount as well as nature of the substance
(D) neither on the amount nor on the nature