CBSE (UGC) NET Paper 1 Questions (Part 4 of 30)
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A B (salt) Na + H2 (alcohol) B MeI C (ether) C Conc. HI MeI A NaOH/I2 iodoform heat. The alcohol A, salt B and ether C, are respectively
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CH3OH, CH3ONa, CH3 − O-CH3
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CH3OH, C2H5ONa, CH3 − O-C2H5
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C2H5OH, C2H5ONa, C2H5 − O-C2H5
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C2H5OH, C2H5ONa, CH3O-C2H5
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In any ecosystem, the primary producers such as photosynthetic plants are the most abundant and predators such as tigers are the least abundant. The fundamental law responsible for this pattern is
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first law of thermodynamics
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second law of thermodynamics
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Mendel's laws of genetics
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law of conservation of mass
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In the Siberian forests, carbon fixation is expected to be maximum in
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January
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July
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October
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April
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Movement of water in a tree takes place in
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roots only
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in the central part of the stem
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in the peripheral part of the stem
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leaves only
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Which of the following is not used as a fertilizer?
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Ammonium nitrate
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Ammonium phosphate
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Urea
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Sodium chloride
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In DNA, Adenosine pairs with Thymine, and Guanine pairs with Cytosine. If Adenosine constitutes 18% and Guanine constitutes 24% of all nucleotides in a DNA preparation, it must be a
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single stranded DNA
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double stranded DNA
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very short stretch of double stranded DNA
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multi-chromosomal DNA
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A bacterium which is 1 in diameter and divides every 20 minutes, forms a 1 mm diameter colony in 24 hours in a growth medium with limited nutrients. The number of cells in the colony is approximately
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1000
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109
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2 × 72
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272
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Burns caused by steam are more serious than burns caused by boiling water because
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steam has large latent heat
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steam has a very large specific heat compared to water
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steam is hotter than boiling water
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steam being a gas makes easy contact with skin
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The largest decimal number that a four byte integer can represent is approximately
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105
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107
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109
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1011
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A modern personal computer is capable of multiplying two numbers in a few
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picoseconds
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nanoseconds
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microseconds
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milliseconds
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