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You Are On Multi Choice Question Bank SET 2437
121851. The single acid which dissolves gold is ?
(A): Aqua regia (B): Hydrochloric acid (C): Nitric acid (D): Selenic acid
121852. Which gas is filled in refrigerators ?
(A): Chlorofluorocarbon (B): Acetylene (C): Methane (D): Butane
121853. Contact lenses are made from ?
(A): Polyvinyl chloride (B): Teflon (C): Polystyrene (D): Lucite
121854. What is extracted from Bauxite ?
(A): Mica (B): Aluminium (C): Copper (D): Tin
121855. Why is phosphorus kept under water ?
(A): to make it wet (B): to make it durable (C): water forms a protective coating on it (D): to save it from catching fire when exposed to dry air
121856. What is the chemical name of table salt ?
(A): Sodium nitrate (B): Ammonium chloride (C): Sodium chloride (D): Calcium chloride
121857. Which of the following elements behave chemically both as a metal and a non metal?
(A): Boron (B): Carbon (C): Argon (D): Mercury
121858. Which of the following gases is the most toxic?
(A): Carbon dioxide (B): Sulphur dioxide (C): Carbon monoxide (D): Acetic acid
121859. The substance that contains the maximum amount of nitrogen is ?
(A): Ammonium Sulphate (B): Urea (C): Ammonium Nitrate (D): Ammonium Chloride
121860. The cyclotron is used to
(A): accelerating particles (B): separating elements (C): purifying metals (D): making alloys
121861. The ejection of electrons when a metal surface is irradiated is known as
(A): Black body radiation (B): Photoelectric effect (C): Zeeman effect (D): Atomic spectrum
121862. Sugars are converted in the liver into
(A): Glycogen (B): Vitamin (C): Monosaccharide (D): None of above
121863. The acid generally stored in batteries is
(A): Nitric Acid (B): Hydrochloric Acid (C): Sulphuric Acid (D): Acetic Acid
121864. What is laughing gas ?
(A): nitrous oxide (B): nitric oxide (C): nitrogen oxide (D): nitrogen peroxide
121865. Permanent hardness of water is due to the presence of ?
(A): Magnesium bicarbonate (B): Calcium bicarbonate (C): Sodium bicarbonate (D): Calcium sulphate
121866. Petroleum is found in ?
(A): Marshy land (B): Metamorphic rocks (C): Igneous rock (D): Sedimentary rocks
121867. Ozone is :
(A): Non-magnetic (B): Paramagnetic (C): Ferromagnetic (D): Diamagnetic
121868. Elements that show the properties of both metals and non metals are called ?
(A): metalloids (B): allotropes (C): alloys (D): colloids
121869. Find the sum of all terms of the progression 120,125,130,---220
(A): 3750 (B): 3570 (C): 3075 (D): 3507
121870. Atomic number of an element gives
(A): the number of nucleons in its atom (B): the number of electrons in its atom (C): the weight of the atom of the element (D): the total number of elementary particles in its atom
121871. What is hottest part of the gas flame is called ?
(A): blue zone (B): luminous zone (C): dark zone (D): non-luminous zone
121872. What is the hardest form of carbon ?
(A): coke (B): graphite (C): charcoal (D): diamond
121873. All noble gases are ?
(A): colourless (B): colourless (C): colourless and odourless (D): colourless and but have odour
121874. Alloys made with mercury as one metal are called ?
(A): mixtures (B): emulsions (C): solders (D): amalgams
121875. Which element found in all organic compounds ?
(A): carbon (B): nitrogen (C): calcium (D): none of them
121876. The main chemical constituent of clay is ?
(A): aluminium silicate (B): zeolites (C): aluminium borosilicate (D): silicon oxide
121877. The high reactivity of fluorine is due to ?
(A): small size of fluorine atom (B): its high electro negativity (C): availability of d-orbitals (D): strong F - F bond
121878. A catalyst is a substance which
(A): increases the activation energy (B): increases the rate of reaction and increases the equilibrium concentration of products (C): changes the equilibrium of a reaction so that the concentration of the product increases (D): hastens the attainment of equilibrium
121879. Chemical used in photography is
(A): sodium sulphate (B): sodium sulphite (C): sodium thiosulphate (D): sodium oxalate
121880. Air is a
(A): compound (B): colloid (C): element (D): mixture
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