Reaction of alcohol, with a carboxylic acid is known as
1 Substitution Reaction
2 Addition reaction
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Brass is an alloy of 1 Nickel and copper 2 Zinc and copper 3 Nickel and zinc 4 Nickel and silver
Deep blue color is imparted to glass by the presence of 1 Iron oxide 2 Cupric oxide 3 Nickel oxide 4 Cobalt oxide
What is the zoology ?
is there any device to convert to mechanical energy into electrical energy
In an atomic nucleus, neutrons and protons are held together by 1 Gravitational forces 2 Magnetic forces 3 Exchange force 4 Coulombic forces
The purest form of iron is 1 Steel 2 Cast iron 3 Pig iron 4 Wrought iron
Which of the following is used as a coolant in nuclear reactors? 1 Heavy water 2 Cadmium 3 Liquid sodium 4 None of these
What is the Protoplasm ?
A man is travelling with the speed of 10m/min across the river to the opposite bank.The river water flows at the speed of 1m/s.Since the water flows at the speed higher than the boatsman, he would definitley reach the opposite river bank in a slant path.What is the length of the path he travelled?. The river is 10m wide. Please give me solution to tha above probelm. Thanks in advance
the river tigris in which city
The property of a substance to absorb moisture from the air on exposure is called 1 Osmosis 2 Dessication 3 Efflorescence 4 Deliquescence
is the big bang theory correct, because as I wondered the explosion is too powerful that no one could survive after galaxies were created no life exist on it after the 3.5 billion years life exist so... my question is were is the life came from?