Recent questions tagged class 10

The following reaction is an example of a $ 4H_3(g)+5O_2(g) \to 4NO+6H_2O$ a. Displacement reaction b. Combination reaction c. Redox reaction d. Neutralisation reaction

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What is a mixture of potassium nitrate powdered charcoal and sulphur called?

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Which of the following gases can be used for storage of fresh sampel of an oil for a long time?

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The isomeric pair is

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Which of the following is formed when sodium hydroxide reacts with hydrochloric acid?

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KOH is used in making of

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Which information is not conveyed by a balanced chemical equation?

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Loss of hydrogen halide from alkyl halide gives

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Which of the following gives the correct increasing order of the atomic radii of O, F and N?

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Which of the following is not a decomposition reaction

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Which of the following gases can be used for storage of fresh sampel of an oil for a long time?

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An element has an atomic number of 15 with which of the following elements will it show similar chemical properties.

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Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?

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Water in swimming pools is purified by adding

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What is a mixture of potassium nitrate powdered charcoal and sulphur called?

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The Ph of a solution of HCL is 4. This shows that the molarity of the solution is

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Soaps are formed by saponification of

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Graphite differs from Diamond because graphite is:

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Mineral acids are stronger acids than carboxylic acids because i. mineral acids are completely ionized ii. carboxylic acids are completely ionized iii. mineral acids are partially ionized iv. carboxylic acids are partially ionized

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Element X forms a chloride with the formula XCl2 , which is a solid with a high melting point . x would most likely be in the same group of the periodic table as

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Naturally occurring metallic compounds are called

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What is the Name of Scientist, who stated that matter can be converted into energy

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When ozone absorbs UV radiation, energy is converted in to

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Which of the following is used for dissolution of gold?

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What among following is used to produce artificial rain ?

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Identify the wrong statement in the following

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The main buffer system of the human blood is

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What kind of element would you find on the far left-hand side of the periodic table?

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Which one of the following depicts the correct representation of atomic radius(r) of an atom ?

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Vinegar is a solution of

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The manufacture of bread, beer and wine involves alcoholic fermentation of glucose to ethanol by yeast. Which of the following five statements concerning this process are correct? I. Yeast carries out fermentation because yeast cells lack mitochondria. II. For every molecule of ethanol produced, one molecule of co1 evolves. III. For every one molecule of glucose fermented, net two molecules of ATP are generated. I V. More than 80% of the chemical energy of the glucose is released as heat. (V) Glycolysis is an integral part of this fermentation.

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By which Reaction metal is obtained from metal oxide

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Raw materials for production of urea are

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What happens when calcium is treated with water?

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Which has triple bond ?

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When the gases sulphur dioxide and hydrogen sulphide mix in the presence of water , the reaction $SO_2+2H_2S \to 2H_2O +3S$ Occurs. Here Hydrogen sulphide is acting as

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Red color of tomatoes is due to alkene named

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Layer which protects earth from being hit by meteoroids is

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Which of the following is not the necessary condition for rusting

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Reactions in which reactants react to form products and simultaneously products reverse back in to reactants are called

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Arrange the following elements in the order of their decreasing metallic character: $Na, Si, Cl, Mg, Al$

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Which of the following are correct structural isomers of butane?

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Which of the following metals does not displace $H_2$ gas from dilute $HCl$ or dilute $H_2SO_4$?

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Vitamin which helps in chemical transmission of images from eye to brain is

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Which one of the following metal reacts vigorously with oxygen and water?

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Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same? i. Good thermal conductivity ii. Good electrical conductivity iii. Ductility iv. High melting point

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A student takes some zinc granules in a test tube and adds dil. HCl to it. He would observe that the colour of the zinc granules changes to :

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Reaction of halogens (Group-VII) and alkane (saturated hydrocarbons) in presence of sunlight is an example of

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An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?

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When a metal replaces hydrogen atom then compound form is

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