HPSC: 1. General Science.

Consider the following statements: 1. An object moving with constant velocity has zero net force acting on it. 2. Action and reaction forces act on the same body. 3. A large force acting for a short time can produce a large change in momentum. How many of the statements given above are correct?

Consider the following pairs: 1. If ciliary muscles are relaxed : focal length of the eye lens increases 2. If eye lens becomes thicker : enables us to see nearby objects clearly 3. For a young adult with normal vision : near point is about 25 cm How many of the above pairs are correctly matched?

Consider the following statements: 1. The loudness of a sound is determined basically by its frequency. 2. The frequency of the sound wave does not change when it travels from one medium to another. 3. Audible range of the average human ear extends from about 20 Hz to 20 kHz. How many of the statements given above are correct?

Consider the following pairs: 1. Horizontal velocity-time graph : Zero acceleration 2. A linear velocity-time graph with non-zero slope : Uniform motion 3. Curved distance-time graph : Non-uniform motion How many of the above pairs are correctly matched?

Given below are two statements: Statement I: If a copper and a nichrome wire of same length and same area of cross-section carry the same current for same time at room temperature then both will produce the same amount of heat. Statement II: If current in a conductor is doubled and time is halved then the heat produced becomes double. In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements: Statement I: For mixing concentrated nitric acid and water, water must always be added slowly to concentrated acid. Statement II: For dilution, solvent is required to be added to the concentrated solution. In the light of the above statements, choose the correct answer from the options given below:

Consider the following information: Substance | Chemical Formula | Use 1. Bleaching Powder | CaOCl2 | Making drinking water free of germs 2. Baking Soda | NaHCO3 | Soda-acid fire extinguisher 3. Washing Soda | Na2CO3 | Removing permanent hardness of water In how many of the above rows is the given information correctly matched?

Given below are two statements: Statement I: Denatured alcohol contains small quantity of methanol, a poisonous substance. Statement II: Methanol is poisonous because it gets oxidized to methanoic acid in liver, which coagulates the protoplasm. In the light of the above statements, choose the correct answer from the options given below:

Consider the following information: Column-A | Column-B | Column-C 1. Smoke | Colloid | Gas in solid 2. Milk | Emulsion | Homogeneous 3. Pumice stone | Foam | Heterogeneous In how many of the above rows is the given information correctly matched?

Given below are two statements: Statement I: All metals evolve hydrogen gas upon reaction with hydrochloric acid. Statement II: Hydrogen carbonates of all metals except sodium, react with acids to give a corresponding salt, carbon dioxide and water. In the light of the above statements, choose the correct answer from the options given below:

Consider the following statements: 1. Dental caries or tooth decay begins when bacteria acting on sugars produce alcohol that soften or demineralise the enamel. 2. Dental caries or tooth decay begins when bacteria acting on sugars produce acetone that soften or demineralise the enamel. 3. Dental caries or tooth decay begins when bacteria acting on sugars produce acids that softens or demineralise the enamel. How many of the statements given above are correct?

Consider the following pairs: 1. Mosquito : Egg, Larva, Pupa & Adult 2. Silk moth : Egg, Larva, Pupa and Adult 3. Cockroaches : Egg, Nymph, Pupa and Adult How many of the above pairs are correctly matched?

Given below are two statements: Statement I: Rabi crops includes paddy, soyabean, pigeon pea, maize and cotton while crops like wheat, gram, peas are kharif crops. Statement II: Vegetables and fruits provide vitamins and minerals in addition to small amounts of proteins and fats. In the light of the above statements, choose the correct answer from the options given below:

Which of the following is/are correct? 1. Fertilizers are commercially available products that provide nitrogen, phosphorous and potassium to crops. 2. Fertilizer contains a large amount of organic matter which improves the water holding capacity of the soil. Select the answer using the code given below:

Consider the following pairs: 1. Natural contraceptive : Lactational Amenorrhea 2. Barrier method : Progestasert 3. Hormone Releasing IUDs : Saheli How many of the above pairs are correctly matched?