Which loses weight on exposure to the atmosphere ?

1. Concentrated H2SO4

2. Solid NaOH

3. A saturated solution of CO2

4. Anhydrous sodium carbonate

Subtopic:  Compounds of Carbon, Preparations, Properties & Uses |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Which of the following compound is weakest Lewis acid ?

(1) BF3

(2) BCl3

(3) BBr3

(4) BI3

Subtopic:  Boron Family- Preparations, Properties & Uses |
 68%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The element among the following that does not show inert pair effect is-

1. Al 2. Sn
3. Pb 4. Thallium
Subtopic:  Boron Family- Preparations, Properties & Uses |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

Pick the correct statement :

(1) Borax is white crystalline solid containing [B4O5(OH)4]2- units

(2) Aqueous solution of borax is acidic in nature.

(3) Cobalt gives green colour in borax bead test.

(4) All are incorrect.

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
 51%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

An amphoteric  oxide among the following is-

1. CO2

2. CO

3. SnO2

4. CaO

Subtopic:  Properties of Glass, Pb & Sn compounds |
 82%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

In B2H6 

(1) there is direct boron-boron bond

(2) the structure is similar to that of C2H6

(3) the boron atoms are linked through hydrogen bridges

(4) all the atoms are in one plane

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
 82%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

From the B2H6 all the following can be prepared except:

(1) H3BO3

(2) [BH2(NH3)2]+ [BH4]-

(3) B2(CH3)6

(4) NaBH4

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
 59%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The correct order of Lewis acid strength of trihalides of boron is:

1. BCl3 > BBr3 > BF3 > BI3

2. BF3 < BBr3 < BCl3 < BI3

3. BF3 < BCl3 < BBr3 < BI3

4. BF3 >BCl3 > BBr3 > BI3

Subtopic:  Boron Family- Preparations, Properties & Uses |
 65%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The correct order of ease of hydrolysis is :

1. CCl4 < SiCl4 < PCl5 < AlCl3

2. AlCl3 < CCl4 < PCl5 < SiCl4

3. CCl4 < AlCl3 < PCl5 < SiCl4

4. CCl4 < AlCl3 < SiCl4 < PCl5

Subtopic:  Compounds of Carbon, Preparations, Properties & Uses |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

advertisementadvertisement

It is because inability of ns2 electrons of the valence shell to participate in bonding that

1. Sn2+ is reducing while Pb4+ is oxidising agent

2. Sn2+ is oxidising while Pb4+ is reducing agent

3. Sn2+ and Pb2+ are both oxidising and reducing agent

4. Sn4+ is reducing while Pb4+ is oxidising agent

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 66%
NEET - 2017
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints