Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions

The protein responsible for blood clotting is ____________.

The helical structure of protein is stabilized by:

The correct statement for protein haemoglobin.

Which functional group participates in disulphide bond formation in proteins?

Alkali halids do not show Frenkel defect because ____________.

Which of the following crystals does not exhibit Frenkel defect?

Silver halides generally show:

What is the effect of Frenkel defect on the density of ionic solids?

In a Schottky defect ____________.

Which of the following aqueous solutions should have the highest boiling point?

\[\ce{CH3CH2CH2Br + NaCN -> CH3CH2CH2CN + NaBr}\], will be fastest in:

A dihalogen derivative ‘X’ of a hydrocarbon with three carbon atoms react with ale. KOH and produces hydrocarbon which forms red ppt. with ammonical Cu₂Cl₂. ‘X’ gives an aldehyde on reaction with aq. KOH. The compound ‘X’ is:

Which of the following has the lowest boiling point?

Which of the following statement is correct:

Major product obtained on reaction of 3-Phenyl propene with HBr in presence of organic peroxide.

Cations are present in the interstitial sites in ______.

Schottky defect is observed in crystals when ______.

Which of the following point defects are shown by AgBr(s) crystals?

1. Schottky defect
2. Frenkel defect
3. Metal excess defect
4. Metal deficiency defect

Which of the following defects is also known as dislocation defect?

Which of the following statements are not true?

(i) Vacancy defect results in a decrease in the density of the substance.

(ii) Interstitial defects results in an increase in the density of the substance.

(iii) Impurity defect has no effect on the density of the substance.

(iv) Frankel defect results in an increase in the density of the substance.