Test Details

Organic Chemistry : Some Basic Principles and Techniques

Che

Dec 05, 12:00 PM

60 minutes

Dec 05, 1:00 PM

45.0 marks

MCQ

45 questions

Prof. Sachin Sinha

MS CHEMISTRY Teaches to students by Research methodology technology

Class Details

Research methodology

CHAPTER WISE TEST

NBTS 2022

Research methodology

CHAPTER WISE TEST

Teaching by Research Methodology

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Question Text

Question 1 :
If true enter 1, if false enter 0. A chemical formula of an ionic compound shows the ratio of the number of atoms of each element present in one formula unit.

Question 2 :
Which property of a compound is determined by the valency of the elements present in the compound?

Question 3 :
The chemical formula which represents the actual number of atoms of each element present in a molecule is known as :

Question 4 :
Which choices among the following are a molecular formula but NOT an empirical formula?

Question 5 :
If true enter 1, if false enter 0. A molecular formula shows the composition of a molecule in terms of the number of atoms of each element present.

Question 6 :
Which of the following is NOT an example of an molecular formula?

Question 7 :
Which of the following is not an example of a molecular formula?

Question 11 :
Assertion: Molecular formula of water is $(H_2O)$. Reason: One molecule of water contains two atoms of hydrogen and one atom of oxygen.

Question 12 :
For a particular compound, which of the following pairs can represent the empirical and the molecular formula, respectively?

Question 13 :
The ______ formula of a compound is a simple multiple of its ____ formula.

Question 14 :
What is the molecular formula for a compound that has an empirical formula of ${C}_{3}{H}_{7}$ and a molar mass of $86.2\ g/mol$?

Question 15 :
A hydrocarbon has an empirical formula of $CH$ and a molar mass of $26\ g/mol$. What is the molecular formula of this compound?

Question 16 :
The molecular formula of a ethane is two times its empirical formula.

Question 17 :
The empirical formula of a compound is $CH_{2}O$. If the molecular weight of the compound is $180$, the molecular formula is:

Question 18 :
The molecular formula of a compound is a simple multiple of its empirical formula.

Question 19 :
A compound of relative molecular mass 34 and empirical formula HO has the molecular formula ___________.

Question 26 :
The displacement of electrons in a multiple bond in the presence of attacking reagent is called:

Question 27 :
Which of the following statement is true about resonance. (A) Resonance is an intramolecular process.

Question 29 :
In which of the following pairs of resonance contributors in the structure on the left an important contributor?

Question 34 :
Which of the following forms the most stable gaseous negative ion?

Question 36 :
Consider the following carbocations : (I) $ C_{6}H_{5}CH^{+}_{2} $ (II) $ C_{6}H_{5}CH_{2}-CH^{+}_{2} $ (III) $ C_{6}H_{5}- CH^{+} -CH_{3} $ (IV) $ C_{6}H_{5}C^{+}(CH_{3})_{2} $ The correct sequence for the stability of these is:

Question 37 :
Heterolytic fission of $C-Br$ bond results in the formation of _______

Question 40 :
What will be the symbolic representation of the following statement? 2 atoms of phosphorous and 7 atoms of oxygen

Question 43 :
In an $S_{N}1$ reaction of alkyl halide on chiral centres there is :

Question 45 :
The most deactivating group for electrophilic substitution reaction in benzene ring is

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