Basic Science Questions and Answers

(A) sodium carbonate

(B) sodium hydroxide

(C) sodium peroxide

(D) sodium monoxide

(A) They emit light of constant intensity

(B) Their distance from the earth does not change with time

(C) They are far away from the earth and as a result the intensity of light decreases

(D) They are closer to the earth, so they get more light and are not visible even if there are small changes in intensity

(A) It has low penetrating power

(B) It moves at the speed of light

(C) it can be both reflected or refracted

(D) can affect the plate of photography

(A) Parthenium

(B) Elephant grass

(C) Water Aquarius

(D) Mogar grass

(A) Waste water from kitchen is

(B) Waste water coming out of toilet is

(C) Waste water from factories is

(D) Waste water from hospitals is

(A) Anthracite

(B) Kajal

(C) Gaphite

(D) Charcoal

(A) Zinc

(B) Lead

(C) Carbon

(D) Tin

(A) Xylem

(B) Phloem

(C) Chloroplast

(D) None of these

(A) Dialysis

(B) Diffusion

(C) Reverse Osmosis

(D) Centrifugation

(A) Monosaccharide

(B) Di-saccharide

(C) Polysaccharide

(D) none of these