Chemistry - Section 1 (6)

Directions to Solve

Chemistry - Section 1

41.

The graphite rods in the nuclear reactor

A.	react with U to release energy
B.	produce neutrons
C.	undergo combustion which triggers the nuclear fission
D.	convert fast moving neutrons into thermal neutrons

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

42.

The ionic radii of N^3-, O^2-, F^- and Na⁺ follows the order

A.	N3- > O2- > F- > Na+
B.	N3- > Na+ > O2- > F-
C.	Na+ > O2- > N3- > F-
D.	O2- > F- > Na+ > N3-

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

43.

The gas used in the manufacture of vanaspati from vegetable oil is

A.	hydrogen
B.	oxygen
C.	nitrogen
D.	carbon dioxide

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

44.

The inexpensive and commonly used variety of glass is called soda glass. It is called so because

A.	was used initially for making bottles of soda(carbonated drink)
B.	is made using soda(sodium carbonate)
C.	was initially used for storing sodium carbonate
D.	is made using soda lime

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

45.

The mass number of a nucleus is

A.	always less than its atomic number
B.	the sum of the number of protons and neutrons present in the nucleus
C.	always more than the atomic weight
D.	a fraction

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

46.

The material which can be deformed permanently by heat and pressure is called a

A.	thermoplastic
B.	thermoset
C.	chemical compound
D.	polymer

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

47.

The items amenable to detection by soft x-rays are

A.	contrabands
B.	lead in bullets
C.	narcotics
D.	genuine coins from counterfeit coins

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

48.

The mass of one Avogadro number of helium atom is

A.	1.00 gram
B.	4.00 gram
C.	8.00 gram
D.	4 x 6.02 x 10 23 gram

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

1
2
3
..
4
5
6
..
8
9
10