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The correct answer is A
Deficiency of which of the following elements is responsible for weakening of bones?
1. Calcium
2. Phosphorus
3. Nitrogen
...
The conversion of hard water into soft water by boiling or adding calcium hydroxide is called:
In a compound, the elements are always present in definite proportions by:
NaCl has which kind of bonds?
Which of the following metals does not liberate hydrogen gas when reacted with cold water but does so with steam?
Flemings right hand rule is used to find the direction of the –
What is the maximum value of deforming force up to which a material shows elastic property and above which the material loses it?
What is the term used for the addition of suitable impurities into the semiconductor for modulating its properties?
Haematite ores is the ore of which metal?
Which of the following vitamins is called a water-soluble vitamin?
