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Chemistry

Chemistry
Which of the following is not present in RNA

Ribose
Uracil
Phosphate
Thymine

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Chemistry
Silica gel is a

Delicious food
Drying agent
Moisturizer
Flavouring agent

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Chemistry
Which of the following is used to remove ink and rust stains on cloth?

Oxalic acid
Kerosene oil
Alcohol
Ether

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Chemistry
Saline soil contains

Lot of moisture
High concentration of salt
Hard rocks
None of these

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Chemistry
The oxidation number of nickel in K4[Ni(CN)4] is

4
–4
Zero
8

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Chemistry
Ozone saves the biosphere by absorbing high energy radiations called ________ .

Infra-red (IR)
X–rays
Ultraviolet rays (UV)
Gamma rays

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