Central Tobaco Research Institute is located at

(1) Bhopal

(2) Hyderabad

(3) Rajahmundry

(4) Calcutta

A famous agricultural scientist who has been awarded a Nobel
Peace Prize is

(1) H.G. Khorana

(2) M.S. Swaminathan

(3) Norman Borlaug

(4) R.N. Mishra

Miller?s experiment proved the theory of

(1) Special Creation

(2) Spontaneous Origin

(3) Eternity of Life

(4) Chemical Evolution

The weight of H2O2 which will give on decomposition 5-6
litres of O2 at NTP is

(1) 17 g

(2) 8.5 g

(3) 34 g

(4) 56 g

Hardening of cement is due to

(1) dehydration

(2) hydrolysis

(3) hydration and hydrolysis

(4) polymerisation

Artificial rain is produced by seeding clouds with

(1) potassium iodide

(2) silver iodide

(3) silver nitrate

(4) copper sulphate

What generally happens when an atom of an electronegative
element becomes an ion?

(1) It loses one or more electrons

(2) It is ionized

(3) Its atomic number increases

(4) It gains electrons

If indium is added in small quantities to germanium, we get

(1) n ? type semiconductor

(2) p ? type semiconductor

(3) rectifier

(4) insulator

The solid that undergoes sublimation is

(1) NaCl

(2) Pb(NO3)2

(3) NH4Cl

(4) (NH4)2 Cr2O7

Freon is

(1) C2 F2

(2) CCl2F2

(3) C2F4

(4) (C2F2)n

A good coal should have high

(1) Moisture content

(2) Ash content

(3) Volatile matter

(4) Fixed carbon

Which one among the following halogen acids is the most
powerful reducing agent?

(1) HI

(2) HCl

(3) HF

(4) HBr

Among the following elements which one is present in
chlorophyll?

(1) Cobalt

(2) Iron

(3) Magnesium

(4) Calcium

The work function for aluminium surface 4.2 eV and that for
sodium surface is 2.0 eV. The two metal surfaces are
illuminated by suitable radiations so as to cause photo
emission. We observe that.

(1) Both A1 and Na will have the same threshold frequency

(2) The threshold frequency of A1 > that of NA

(3) The threshold frequency of Na > that of Al

(4) The threshold wavelength of Al > that of Na

Atoms are arranged at the corners of a smple cubic lattice.
The number of atoms per unit cell is

(1) 1

(2) 2

(3) 4

(4) 8