An element X has isotopic masses of 6 and 7. if the relative abundance is…
An element X has isotopic masses of 6 and 7. if the relative abundance is 1 to 12.5…
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An atom 23892X decays by alpha particle emission to give an atom Y. The atomic…
An atom 23892X decays by alpha particle emission to give an atom Y. The atomic number and mass…
Which of the following pairs of solutions will produce a precipitate when mixed?
Which of the following pairs of solutions will produce a precipitate when mixed? A. Pb(NO3)2(aq) and NaCI(aq) B.…
Which of the following substance is an alloy of lead?
Which of the following substance is an alloy of lead? A. Brass B. Duralumin C. Stainless steel D.…
In which of the following processes is biotechnology not applied?
In which of the following processes is biotechnology not applied? A. Manufacture of drugs B. Treatment of domestic…
Ethyne undergoes the following reactions except
Ethyne undergoes the following reactions except A. polymerisation B. addition C. substitution D. esterification Correct Answer: Option D…
Hardness in water can be removed by adding
Hardness in water can be removed by adding A. copper (ll) tetraoxosulphate (IV) B. sodium trioxocarbonate (IV) C.…
Which of the following substances is a non-reducing sugar?
Which of the following substances is a non-reducing sugar? A. Sucrose B. Glucose C. Fructose D. Maltose Correct…
What is the major product formed when C2H5OH reacts with CH3COOH?
What is the major product formed when C2H5OH reacts with CH3COOH? A. C2H5COOCH3 B. C2HCOCH3 C. CH3COOC2H5 D.…
The colour of the solution formed when ethyne reacts with an acidic solution of potassium…
The colour of the solution formed when ethyne reacts with an acidic solution of potassium tetraoxomanganate (VII) is…