Which of the following materials fall in the category of a "pure substances"? Give reasons.
(a) Ice (b) Milk (c ) Iron (d) Hydrochloric acid ( e) Calcium oxide (f) Mercury (g) Brick (h) Wood (f) Air

Some pure substances in your home are a) Ice B) milk c) iron d) air e) water f) gold g) coal

Read the following. Classify them basing on consuming them with peels or without peels. (a)Banana (b) Seedless grapes (c)Sapota (d)Apples (e) Sweets lime (f) Staw-berry (g) Mango (h) Guava

Classify the following into elements, compounds and mixtures . a) Sodium b) Soil c) Sugar Solution d) Silver e) Calcium carbonate f) Tin g) Silicon h) Coal i) Air J) Soap k) Methane l) Carbondioxide m) Blood

Write the balanced chemical equation for the following and indentify the type of reaction in each case. (AS1) (a) "Calcium hydroxide"_((aq)) + "Nitric acid"_((aq)) to "Water"_(I) + "Calcium nitrate"_((aq)) (b) "Magnesium"_((s)) + "Iodine"_((g)) to "Magnesium Iodide"_((s)) (c) "Magnesium"_((s)) + "Hydrochloric acid"_((aq)) to "Magnesium chloride"_((aq)) + "Hydrogen"_((g)) (d) "Zinc"_((s)) + "Calcium chloride"_((aq)) to "Zinc Chloride"_((aq)) + Ca_((s))

In which of the following substances the light can scatter ? a) Milk b) Starch solution (before particles settled down) c) Starch solution (after particles settled down) d) Water e) Gold f) Oil + Water

Which of the following provide second line of defence? A) Lysozyme of tears B) Phagocytes C) Mucus membranes D) Antibodies E) Large lymphocytes F) Fever

What is the measure of /_A+/_B+/_C+/_D+/_E+/_F in the figure given below. Give reason to your answer.

List. I a) Among solids and liquids specific heat is maximum for b) In liquids specific beat is minimum for c) With increase of pressure the boiling point of a liquid d) With increase of pressure the melting pointof a solid substance which contracts on melting List- II e) Mercury f) Water g) Increases h) Decreases

Define the following terms: (a) Aestivation (b) Placentation (c) Actinomorphic (d) Zygomorphic (e) Superior ovary (f) Perigynous flower (g) Epipetalous Stamen