The incorrect statement among the following is-

1. Lithium is the strongest reducing agent.

2. Density of potassium is more than sodium.

3. Cs are used in devising photoelectric cells.

4. All alkali metals give a blue solution in liquid ammonia.

Subtopic:  Physical Properties |
 73%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which salt will not impart color to flame?

1. LiCl

2. MgCl2

3. CaCl2

4. KI

Subtopic:  Chemical Properties |
 74%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following alkali metal ion in aqueous solution is the best conductor of electricity?

(1) Li+

(2) Na+

(3) Cs+

(4) K+

Subtopic:  Chemical Properties |
 66%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

An ion among the following that have largest size in an aqueous solution is -

1. Rb+

2. Na+

3. K+

4. Li+

Subtopic:  Chemical Properties |
 74%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A colourless salt among the following that gives violet colour to Bunsen flame is -

1. Na2CO3

2. K2CO3

3. Cu(OH)2

4. MgCO3

Subtopic:  Physical Properties |
 85%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A compound soluble in pyridine is:-

1. LiCl

2. CsCl

3. NaCl

4. KCl

Subtopic:  Physical Properties |
 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Dissolving metallic Zn in excess of NaOH produces:-

(1) Na2ZnO2

(2) Zn(OH)2

(3) ZnO

(4) Zn(OH)2 & Na2ZnO2

Subtopic:  Physical Properties |
 57%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

 Superoxide is formed on heating with an excess of air by:-

1. Li, Na

2. Mg, Be

3. Na, K

4. K, Rb

Subtopic:  Physical Properties | Chemical Properties |
 82%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

For the alkali metals, which of the following increases with increasing atomic number:-

1. Ionization potential

2. Electronegativity

3. Atomic radius

4. Hydration energy of the univalent ion

Subtopic:  Physical Properties |
 89%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

On heating Li2CO3 and Na2CO3.10H2O, residue is left after heating. The weight loss is due to

1. Evolution of CO2 from Na2CO3.10H2O only

2. Evolution of CO2 from Li2CO3 only

3. Due to evolution of CO2 from Li2CO3 and H2O from Na2CO3.10H2

4. H2O from  Na2CO3.10H2

Subtopic:  Chemical Properties |
 79%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh