Hydrogen And S Block Elements, Popular Questions: Jee Online course CHEMISTRY, Chemistry

Sushmita asked a question

Subject: Chemistry, asked on on 14/1/17

why is bond dissociation enthalpy different for isotopes of hydrogen?

Abhishek Paul asked a question

Subject: Chemistry, asked on on 2/5/17

Please explain in detail.

Sushmita asked a question

Subject: Chemistry, asked on on 14/1/17

why is the thermal conductivity of para hydrogen more than ortho hydrogen? and why is para hydrogen abundant at lower temperatures?

Janus Jerome asked a question

Subject: Chemistry, asked on on 3/11/16

covalent compounds like glucose and ethanol dissolves in water. Please find me the answer

Reema S Gera asked a question

Subject: Chemistry, asked on on 26/10/16

What do you mean by stabilizer? Why is urea used as a stabilizer in storing hydrogen peroxide?

Shiv asked a question

Subject: Chemistry, asked on on 10/12/17

Mg and Li have similar properties due to:- a) same e/m ratio b) same electron affinity c) same group d) same ionic potential Give proper Explaination No link

Abhishek Paul asked a question

Subject: Chemistry, asked on on 10/4/17

Please explain in detail

Q (Y e l l o w p p t) T \overset{K_{2} C r O_{4} / H^{+}}{\leftarrow} X \overset{d i l . H C l}{\to} Y (Y e l l o w p p t) + Z ↑ (p u n g e n t s m e l l i n g g a s) I f X g i v e s g r e e n f l a m e t e s t . T h e n, X i s (A) M g S O_{4} (B) B a S_{2} O_{3} (C) C u S O_{4} (D) P b S_{2} O_{3}

Abhishek Paul asked a question

Subject: Chemistry, asked on on 10/4/17

Question

Q 22 N a + A l_{2} O_{3} \overset{H i g h t e m p e r a t u r e}{\to} X \to_{w a t e r}^{C O_{2} i n} Y; c o m p o u n d Y i s (A) N a A l O_{2} (B) N a H C O_{3} (C) N a_{2} C O_{3} (D) N a_{2} A l O_{3}

Janus Jerome asked a question

Subject: Chemistry, asked on on 3/11/16

how is very pure H2(g) prepared

Shiv asked a question

Subject: Chemistry, asked on on 10/12/17

Which one of the following is the strongest base? 1Ash3 2 sbh3 3 ph3 4 NH3 Give. Explanation No links...

Rutika Vitthal Marne. asked a question

Subject: Chemistry, asked on on 18/10/16

is every compound of hydrogen called as hydride

Sadiya Khan asked a question

Subject: Chemistry, asked on on 29/4/17

Solve this.

Sreejit asked a question

Subject: Chemistry, asked on on 4/12/16

What happens to the solubility of group 1 oxides down the group.?

Abhishek Paul asked a question

Subject: Chemistry, asked on on 2/5/17

Question-

Shiv asked a question

Subject: Chemistry, asked on on 12/12/17

which one of the following has maximum value of cationic/anionic ratio Ecc

Shiv asked a question

Subject: Chemistry, asked on on 12/12/17

Which one out of the NaOH and KOH, is a better absorber of CO2 ? (a) NaOH (b) KOH (c) both absorb CO2 equally (d) can not be predicted. Give explanation.no link

Abhishek Paul asked a question

Subject: Chemistry, asked on on 10/4/17

Question

Q 48 X \overset{C_{o} C l_{2}}{\to} C a C l_{2} + Y ↑; t h e e f f e c t i v e i n g r e d i e n t o f X i s (A) O C l^{-} (B) C l^{-} (C) O C l^{+} (D) O C l_{2} -

Abhishek Paul asked a question

Subject: Chemistry, asked on on 10/4/17

If A is the metallic salt, then the white ppt. of D must be of
(A) Stronsium carbonate (B) Red lead (C) Barium carbonate (D) Calcium carbonate

Rutika Vitthal Marne. asked a question

Subject: Chemistry, asked on on 16/5/17

in Q.1 answer is 4 but how is it possible since all other than (BO3^3- ) do not have electron to enite ? explain

Abhishek Paul asked a question

Subject: Chemistry, asked on on 20/4/17

Question-

Abhishek Paul asked a question

Subject: Chemistry, asked on on 10/4/17

Q. The commercial method of preparation of potassium by reduction of molten KCI with metallic sodium at 850°C is based on the fact that
(A) potassium is solid and sodium distils off at 850°C
(B) potassium being more volatile and distils off thus shifting the reaction forward
(C) sodium is more reactive than potassium 850°C
(D) sodium has less affinity to chloride ions in the presence of potassium ion

Shiv asked a question

Subject: Chemistry, asked on on 12/12/17

which of the following atoms wil has smallest size 1 Mg 2 Na 3 Be 4 Li. Explain answer with correct explanation. No link