Physics

CHEMISTRY

1-Which of the following will have maximum pH? 

(A) Human saliva      (B) Black coffee

(C) Human blood       (D) Gastric juice

Ans-(C)

2- F-centre is produced due to?

(A)Unpaired electron occupied anionic vaccancies

(B)Monovalent ion is replaced by bivalent ion

(C)Ions present in cationic vaccancies 

(D)Disslocation of ions

Ans-(A)

(3)Which of the following is correct for ZnO?

(A)Impart color due to change transfer

(B)On heating it turns yellow

(C)Zn can reduce hydrogen at room temprature

(D)It sublimises on heating

Ans-(B)

4-By which method we can convert ppt to colloidal solution?

(A)Peptization       (2)Homogenisation

(C)Dispersion        (D)Solvation

Ans-(A)

5-Which can displace Al from Alum?

(A)Mn            (B)Tl

(C)Sc              (D)In

Ans-(C)

6-Which one is wrong?

(A)Pyroxene is a linear silicate

(B)Zeolite is a 2 dimensional double strand silicate

(C)Beryl is a cyclic silicate

(D)Pyrex is a man-made silicate

Ans-(B)

7-Which shows least number of oxidation states?

(A)Mn                (B)Th

(C)Cr                 (D)Np

Ans-(B)

8-Spin only magnetic moment of a divalent metal ion having total 23 electron?

(A)5.9              (B)5.2

(C)4.0              (D)5.0

Ans-(A)

9-Benzene is?

(A)Weakly attracted in the magnetic field

(B)Strongly attracted in the magnetic field

(C)Strongly repelled in magnetic field 

(D)Weakly repelled in magnetic field

Ans-(D)

10-Which cell organelle is mainly involved in glycosylation of protiens?

  (A)ER        (B)Mitrochondria

(C)Lysosomes (D)Peroxisomes

Ans-(A)