Carbon monoxide is

I. Produced from incomplete burning of fuels such as petrol and diesel
II. It is a poisonous gas and reduces the oxygen-carrying capacity of the blood
Which is INCORRECT?
(a) I Only
(b) II Only
(c) I & II
(d) None

Which is CORRECT?

I. Smoke may contain oxides of nitrogen which combine with other air pollutants and fog to form smog.
II. The smog causes breathing difficulties such as asthma, cough and wheezing in children
(a) I Only
(b) II Only
(c) I & II
(d) None

 Match [Source – Pollutant]

I. Petroleum refineries a. Sulphur dioxide and nitrogen dioxide
II. Coal power plants b. Sulphur dioxide
III. Refrigerators c. Chlorofluorocarbons
IV. Automobiles (diesel and petrol) d. Tiny Particles
I II III IV
(a) b a c d
(b) a b c d
(c) a b d c
(d) b a d c

Kanpur is known for which industries?

1. Fertiliser 2. Detergent3. Leather 4. Paint
(a) 1 Only
(b) 3 Only
(c) 1 & 2
(d) 1, 2, 3 & 4

Which is INCORRECT?

(a) The Pole star lies close to the axis of rotation of the Earth
(b) Like Mars, Uranus also rotates from east to west
(c) Saturn is the least dense among all the planets
(d) The outer planets have large number of moons

Which is INCORRECT?

(a) Iris is the part of that eye which gives it its distinctive colour
(b) The most comfortable distance at which one can read with a normal eye is about 50 cm
(c) If still images of a moving object are flashed on the eye at a rate faster than 16 per second, then, the eye perceives this object as moving
(d) Eye lens becoming cloudy is called cataract

 A: A night bird (owl) can see very well in the night but not during the day

R: A night bird has on its retina a large number of rods and only a few cones
(a) A & R are CORRECT; R is CORRECT explanation for A
(b) A & R are CORRECT; But, R is not-CORRECT explanation for A
(c) A is CORRECT; But not R
(d) R is CORRECT; But not A

 Which of the following statements are CORRECT about Braille System?

1. It has 63 dot patterns or characters
2.Dots are arranged in cells of two vertical rows of three dots each
(a) 1 Only
(b) 2 Only
(c) 1 & 2
(d) None

If electrodes were immersed in water, and a current is passed

(a) Oxygen bubbles formed at the positive terminal
(b) Hydrogen bubbles formed at the positive terminal
(c) Hydrogen bubbles formed at the negative terminal
(d) A & C

 Match [electroplating – purpose]

I. Tin a. Resists scratches
II. Chromium b. Protection from getting spoilt
III. Gold c. Appearance
IV. Zinc d. Protection from corrosion

I II III IV
(a) b a c d
(b) a b c d
(c) a b d c
(d) b a d c

 Fertilization very common in aquatic animals is

(a) External fertilization
(b) Internal fertilization
(c) In vitro fertilization
(d) B & C