ECAT Pre Engineering Chemistry Chapter 1 MCQ Test With Answer

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ECAT Chemistry Chapter 1 Important MCQ's

Sr.#	Question	Answer
1	The number of subatomic particles in atoms sidcovered is more than:	A. 110 B. 100 C. 125 D. 90
2	C₆H₁₂O₆and C₁₂H₂₂O₁₁ are:	A. Mono-atomic molecules B. Diatomic molecules C. Poly-atomic molecules D. Hetero atomic molecules
3	The mass of Al₂S₃formed when 20 grams Al reacts completely with S is	A. 60 g B. 50 g C. 50.55 g D. 55.55 g
4	Which one of the following step is not involved in determination of empirical formula	A. Determination % of each element B. Determination of gram atom of each element C. Determination of isotopes of each element D. Determination of atomic ratio of element
5	Which one of the following statements is not correct	A. A molecule is the smallest particle of an element which can exist independently B. He is a molecule of helium C. S₈is a molecule of sulphur D. O₃is a molecule of oxygen
6	Which of the sub-atomic particles is not charged	A. Electron B. Proton C. Neutron D. All of them
7		A. 300 cm³ B. 200 cm³ C. 150 cm³ D. 100 cm³
8	Atoms can be evident by use of electron microscope, field ionization microscope and:	A. x-rays B. Video camera C. Telescope D. Compound microscope
9	One mole of ethanol and one mole of ethane have an equal	A. Mass B. Number of atoms C. Number of electrons D. Number of molecules
10	A species having positive or negative charge is called:	A. Electron B. Ion C. Proton D. Atom

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ECAT Pre Engineering Chemistry Chapter 1 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 1 Basic Concepts

ECAT Chemistry Chapter 1 Basic Concepts

Mass spectrometer measures the

Which one of the following compounds does not have the empirical formula CH2O?

The empirical formula of a compound is CH2O. What may be the compound

Each molecule of haemoglobin is 68000 times heavier than one atom of

Where energy is released during a reaction it is

Hemoglobin is 68000 times heavier than:

X-ray work has shown that the diameters of atom are of the order of

Al3+is a symbol for aluminium

The number of isotopes of gold is

Benzene is stable to:

A beaker contains 9 grams of water. The number of H-atoms is

Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same

The value of R(General Gas Constant) is

Smallest particle of an element which may or may not have independent existence is known as:

When nitrogen is 5.6 grams in NO2. then number of moles of NO2is

The number of moles of CO2which contain 8.0 g of oxygen

The amount of products obtained from the balanced chemical equation is regarded as

The volume occupied by 1.4 g of N2 at S.T.P is

A molecule of haemoglobin is made up if nearly

The atomic mass is measured in atomic mass unit (a.m.u.) which is equal to

The mass of Al2S3formed when 20 grams Al reacts completely with S is

Determination of atomic masses and invention of system of writing symbols was made by:

The relative atomic mass of chlorine is 35.5. What is the mass of 2 mol of chlorine gas

The isotopes of an element

A limiting reactant is one which according to the stoichiometric equation

Isotopes differ in the

Which statement about an atom is true ?

The number of subatomic particles in atoms sidcovered is more than:

Which one of the following step is not involved in determination of empirical formula

Covalent compound s mostly exist in the form of:

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ECAT Chemistry Chapter 1 Important MCQ's

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Which one of the following compounds does not have the empirical formula CH₂O?

The empirical formula of a compound is CH₂O. What may be the compound

Al³⁺is a symbol for aluminium

When nitrogen is 5.6 grams in NO₂. then number of moles of NO₂is

The volume occupied by 1.4 g of N₂at S.T.P is

The mass of Al₂S₃formed when 20 grams Al reacts completely with S is