Which is the most abundant metal in the Earth’s crust? [A] Iron [B] Aluminium [C] Copper [D] Silicon
Which of these non-metals is mainly used as an inert shielding gas? [A] Xenon [B] Hydrogen [C] Argon [D] Krypton
Which of these chemical is used to form soaps containing sodium salts? [A] Sulphuric acid [B] Sodium hydroxide [C] Nitric acid [D] Carbonic acid
Which of the following is used as a food preservative? [A] Table salt [B] Salts of sorbic acid [C] Sodium benzoate [D] All of the above
Which of the following elements is present in heavy water? [A] Heavy Oxygen [B] Heavy Hydrogen [C] Heavy Chlorine [D] Heavy Nitrogen
Chewing gum is made from which of the following? [A] Resin [B] Polystyrene [C] Polyvinyl acetate [D] Latex
Which among the following metals is used for galvanization? [A] Zinc [B] Copper [C] Silver [D] Iron
Which of the following gases is heavier than oxygen? [A] Ammonia [B] Methane [C] Helium [D] Carbon dioxide
Which of the following is the process of loosing electrons? [A] reduction [B] oxidation [C] both oxidation and reduction [D] radiation
Most liquids that conduct electricity are solutions of acids, base and which of the following? [A] Aluminium [B] Copper [C] Iron [D] Salts
Which does the gas turn lime water milky? [A] Oxygen [B] Hydrogen [C] Carbon Dioxide [D] Carbon Monoxide
Due to which of the following acids, Milk tastes sour when kept in the open for sometime? [A] Lactic Acid [B] Citric Acid [C] Acetic Acid [D] Carbonic Acid
Which two elements are combined to form candles? [A] Paraffin Wax and Stearic Acid [B] Bees Wax and Stearic Acid [C] Higher Fat Acids and Stearic Acid [D] Bees Wax and Paraffin Wax
Which one of the following forms the chief constituent of Vinegar? [A] Formic acid [B] Acetic acid [C] Salicylic acid [D] Oxalic acid
Which particle is the most essential component to continue the chain reaction during the uranium fission? [A] Electron [B] Proton [C] Neutron [D] Positron
What kind of fertilizer is Urea? [A] Sodium fertilizer [B] Phosphatic fertilizer [C] Nitrogenous fertilizer [D] Potassium fertilizer
Which of the following is a physical change? [A] Oxidation [B] Reduction [C] Sublimation [D] Decomposition
The nucleus of an atom consists of which of the following? [A] Electrons and Neutrons [B] Electrons and Protons [C] Protons and Neutrons [D] All of the above
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Evaluate :
∫2xcos(x2 – 5).dx
If the sum of 14 terms of an A. P is 1050 its first term is 10 find 20th term ?
Diagonals of a quadrilateral 30 cm long and the perpendicular drawn from the opposite vertices are 5.6 and 7.4 cm find the area of the quadrilateral.with steps ?
Find the sum of the integers between 10 and 30 including 10 and 30 which are not divisible by 3.
A cyclic quadrilateral pqrs are where PS equals to PQ and angle SPQ is 70 degree find angle psq