13551. The type of glass used in making lenses and prisms is?
13552. The two elements that are frequently used for making transistors are?
13553. The two diseases that most often kill AIDS victims are 1.Kaposi's sarcoma 2.Lymphangioma 3.Pneumocystis carinii pneumonia 4.Systemic Lupus erythromatosus
13554. The time taken by the Sun to revolve around the center of our galaxy is?
13555. The throwing back of waves from an obstacle is called _______
13556. The theory which advocates that living beings can arise only from other living beings is termed as?
13557. The study which deals with secret writing is known as?
13558. The study of poisons is called?
13559. The study of phenomena at very low temperatures is called _______
13560. The strongest acid among the following is?
13561. The speed with which molecules move inside a gas depends on _______
13562. The speed of light with the rise in the temperature of the medium _______
13563. The solar eclipse occurs when _______
13564. The smallest functional and structural unit of kidney is called as?
13565. The SI unit of electric field is?
13566. The sensation of weightlessness in a spacecraft in orbit is due to _______
13567. The scientist associated with the success of Green Revolution is?
13568. The scientific name of Indian Tiger is ?
13569. The resources which can be used continuously, year-after-year are called?
13570. The raw material used in marking synthetic rubber is?
13571. The ratio of the sizes of a Fahrenheit degree to a Celsius degree is _______
13572. The ratio of pure gold in 18 carat gold is _______ percent?
13573. The radioactive element most commonly detected in humans is _______
13574. The quantity of water Vapour, the atmosphere can hold
13575. The protein which transports oxygen in the blood stream is _______
13576. The property of a substance to absorb moisture from the air on exposure is called?
13577. The process of removing hardness of water is called ?
13578. The process of phagocytisis is related to _______
13579. The presence of which of the following salts in water causes corrosion in steam boilers ?
13580. The planet which shows phases is _______
13581. The planet earth loses heat mainly by _______
13582. The PH of a base solution is always _______
13583. The persons working in textile factories such as carpet weavers are exposed to which of the following occupational disease?
13584. The period of revolution of a geostationary satellite is _______
13585. The percentage of carbon is the least in _______
13586. The percantage of lead in pencil lead is _______
13587. The Panda belongs to the same family as that of _______
13588. The oxide of Nitrogen used in medicine as anaesthetic is?
13589. The number of electrons present in H is?
13590. The nuclear reaction involved in a nuclear reactor is?
13591. The New moon?
13592. The nature of light waves is similar to _______
13593. The name of the white revolution is associated with?
13594. The Multi-Lingual Natural Disaster Information System (NDIS) has been developed by?
13595. The most serious environmental pollution from a nuclear reactor is?
13596. The most malleable metal is ___
13597. The most important ore of aluminium is _______
13598. The most electropositive element among the following is?
13599. The most commonly used chemicals for the "artificial rainmaking" or cloud seeding are?
13600. The most abundant organic molecule on the surface of the Earth is?
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