13905. Brass gets discoloured in air due to the presence of which gas in air ?
13906. Brass gets discoloured in air because of the presence of which of the following gases in air?
13907. Blue tooth technology is used in ?
13908. Bleaching powder is made up from _______
13909. Biomass energy is?
13910. Biodiversity forms the basis for human existence in the following ways: Soil formation Prevention of soil erosion Recycling of waste Pollination of crops
13911. Bell metal is an alloy of?
13912. Bar' is the unit of ?
13913. Balloons are filled with?
13914. Auroae are a result of the interaction of earth's magnetosphere with _______
13915. Atoms of an element differ from those of all other elements in?
13916. Atoms are composed of?
13917. Atomic Power Station is located in which of the following places in India?
13918. At present, scientists can determine the arrangement or relative positions of genes of DNA sequences on a chromosome. How does this knowledge benefit us? It is possible to know the pedigree of livestock. It is possible to understand the causes of all human diseases. It is possible to develop disease-resistant animal breeds. Which of the statements given above is/are correct?
13919. Aspirin is _______
13920. Aspartame is an artificial sweetener sold in the market. It consists of amino acids and provides calories like other amino acids. Yet, it is used as a low-calorie sweetening agent in food items. What is the basis of this use?
13921. As you go down into a well, your weight _______
13922. Are nanometres and micrometres larger or smaller than centimetres ?
13923. An oil tanker is partially filled with oil and moves forward on a level road with uniform acceleration. The free surface of oil then
13924. An invertebrate with a body in three sections and usually three pairs of legs and one or two pairs of wings`. This is related to which of the following ?
13925. An element found in all organic compounds is?
13926. An alloy used in making heating elements for electric heating devices is ?
13927. Among the various allotropes of carbon _______
13928. Among the following, the one representing a physical change is the?
13929. Amalgams are?
13930. Alpha-keratin is a protein present in ?
13931. All the colours in a TV screen are produced from (1) red (2) blue (3) green (4) yellow
13932. All acids contain which element?
13933. Air is _______
13934. Acupuncture is widely practised in?
13935. Actinides are the elements with atomic numbers from?
13936. Acid rain originates from _______
13937. According to Einstein's mass- energy relation which is correct equation?
13938. According to Avogadro's Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called ____ .
13939. Ability of the eye to see object at all distances is called _______
13940. A wave in which the particles of the material move up and down as the wave goes from left to right is known as?
13941. A unit of energy is the same as that of _______
13942. A temperature of 295 K is equivalent to approximately?
13943. A super conductor is characterised by ?
13944. A strong puff of air puts out a flame because _______
13945. A solution of washing soda in water is _______
13946. A solid needle placed horizontally on the surface of the water floats due to?
13947. A small weight is put on the pressure cooker. It increases the pressure of the steam because _______
13948. A shooting star is basically a _______
13949. A series of change that the computer makes on the basic facts we give to it is called _______
13950. A sandy and saline area is the natural habitat of an Indian animal species. The animal has no predators in that area but its existence is threatened due to the destruction of its habitat. Which one of the following could be that animal?
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