Unpolarized light falls first on polarizer (P) and then on analyzer (A). If the intensity of the transmitted light from the analyser is 1 / 8 th of the incident unpolarized light. What will be the angle between optic axes of P and A?

1) 45^o
2) 30^o
3) Zero
4) 60^o

Order of reactivity of halogen acids towards an alcohol is:

1) HCl > HBr > HI
2) HBr > HI > HCl
3) HI > HBr > HCl
4) HI > HCl > HBr

 Which of the following is called calomel?

1)  Hg(NO₃)₂

2)  HgCl₂

3)  Hg₂Cl₂

4)  HgSO₄

 Pollination by birds is

 1. anemophily
 2. hydrophily
 3. entomophily
 4. ornithophily

The delimiting outer membrane absent in
1. Mitochondria
2. Nucleoli
3. Lysosomes
4. Plastids

The liver cells store
1. Glucose 
2. Sucrose 
3. Cellulose 
4. Glycogen

The Kung tribe living in the Kalahari desert of South Africa depend for their food needs on the seeds of

1) Cereus grandiflorus
2) Ananas comosus
3) Bauhinia esculenta 
4) Welwitschia mirabilis

The ratio of number of moles of KMnO₄ and K₂Cr₂O₇ required to oxidize 0.1 mol Sn²⁺ to Sn⁺⁴ in acidic medium:

1) 6 : 5
2) 5 : 6
3) 1 : 2
4) 2 : 1 

The type of chromosomes based on the number and location of the centromere found in human cell is:

(1) Acentric
(2) Submetacentric
(3) Polycentric
(4) Acrocentric

A malfunction of the lymph nodes would most likely interfere with the

1. release of carbon dioxide into the lymph
2. filtering of glucose from the lymph
3. release of oxygen into the lymph
4. filtering of bacteria from the lymph