Chemistry Test 207

Question 1
4 / -1

Which of the following can replace zinc from ZnSO₄ solution?

A
Copper

B
Mercury

C
Iron

D
Aluminium

Question 2
4 / -1

Which of the following compounds will not undergo decomposition on passing electricity through the aqueous solution?

A
Sugar

B
Sodium acetate

C
Sodium chloride

D
Sodium bromide

Question 3
4 / -1

Most of the times to determine the temperature in an electric furnace, thermometer containing thermocouple is used. From the e.m.f. of the thermocouple the actual temperature of the substance is measured. The e.m.fe.m.f. of the thermocouple varies with the centigrade temperature as follows: e.m.f. = (0.2 t − 5 × 10⁻⁴ × t²) mV.

The given thermometer is calibrated with the freezing point and the boiling point of water. If the thermocouple reads e.m.f. 105 m V in the blast furnace, then what is the temperature of the blast furnace in degree centigrade?

A
105°C

B
700°C

C
157.5°C

D
1700°C

Question 4
4 / -1

During the electrolysis of solution of AgNO₃, 9650 C charge was passed through the electroplating bath, then the mass of silver deposited on the cathode is

A
1.08 g

B
10.8 g

C
21.6 g

D
108 g

Question 5
4 / -1

The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 seconds is (charge on electron = 1.60 × 10⁻¹⁹ C = 1.60 × 10^-19 C)

A
6 × 10²³

B
6 × 10²⁰

C
3.75 × 10²⁰

D
7.48 × 10²³

Question 6
4 / -1

For the second period elements the correct increasing order of first ionization enthalpy is

A
L i < Be < B < C < O < N < F < Ne

B
Li < Be < B < C < N < O < F < Ne

C
Li < B < Be < C < O < N < F < Ne

D
Li < B < Be < C < N < O < F < Ne

Question 7
4 / -1

Which of the following oxides is most acidic in nature?

A
MgO

B
BeO

C
BaO

D
CaO

Question 8
4 / -1

The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration?

A
Carbon family, [Rn]5f¹⁴6d¹⁰7s²7p²

B
Oxygen family, [Rn] 5f¹⁴6d¹⁰7s²7p⁴

C
Nitrogen family, [Rn] 5f¹⁴6d¹⁰7s²7p⁶

D
Halogen family, [Rn] 5f¹⁴6d¹⁰7s²7p⁵

Question 9
4 / -1

The species Ar, K⁺ and Ca²⁺ contain the same number of electrons. In which order do their radii increase?

A
Ca²⁺ < K⁺ < Ar

B
K⁺< Ca²⁺<Ar

C
Ar < K⁺ < Ca²⁺

D
Ca²⁺ < Ar < k⁺

Question 10
4 / -1

Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O?

A
Al < Ca < O < C < F

B
Al < O < C < Ca < F

C
C < F < O < Al < Ca

D
Ca < Al < C< O< F

Submit Test

Chemistry Test ...

Question 1

Copper

Mercury

Iron

Aluminium

Question 2

Sugar

Sodium acetate

Sodium chloride

Sodium bromide

Question 3

105°C

700°C

157.5°C

1700°C

Question 4

1.08 g

10.8 g

21.6 g

108 g

Question 5

6 × 1023

6 × 1020

3.75 × 1020

7.48 × 1023

Question 6

L i < Be < B < C < O < N < F < Ne

Li < Be < B < C < N < O < F < Ne

Li < B < Be < C < O < N < F < Ne

Li < B < Be < C < N < O < F < Ne

Question 7

MgO

BeO

BaO

CaO

Question 8

Carbon family, [Rn]5f146d107s27p2

Oxygen family, [Rn] 5f146d107s27p4

Nitrogen family, [Rn] 5f146d107s27p6

Halogen family, [Rn] 5f146d107s27p5

Question 9

Ca2+ < K+ < Ar

K+< Ca2+<Ar

Ar < K+ < Ca2+

Ca2+ < Ar < k+

Question 10

Al < Ca < O < C < F

Al < O < C < Ca < F

C < F < O < Al < Ca

Ca < Al < C< O< F

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6 × 10²³

6 × 10²⁰

3.75 × 10²⁰

7.48 × 10²³

Carbon family, [Rn]5f¹⁴6d¹⁰7s²7p²

Oxygen family, [Rn] 5f¹⁴6d¹⁰7s²7p⁴

Nitrogen family, [Rn] 5f¹⁴6d¹⁰7s²7p⁶

Halogen family, [Rn] 5f¹⁴6d¹⁰7s²7p⁵

Ca²⁺ < K⁺ < Ar

K⁺< Ca²⁺<Ar

Ar < K⁺ < Ca²⁺

Ca²⁺ < Ar < k⁺