NCERT Solutions for Class 10 Science Chapter 5. We covered all the NCERT Solutions for Class 10 Science Chapter 5 in this post for free so that you can practice well for the exam.
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MCQ on NCERT Solutions for Class 10 Science Chapter 5
In the modern periodic table, one of the following does not have an appropriate position
(a) transition elements
(b) inert gases
(c) inner transition elements
(d) halogens
Option c – inner transition elements
The elements with atomic numbers 9, 17, 35, 53, and 85 belong to
(a) alkali metals
(c) halogens
(d) noble gases
Option c – halogens
Consider the following statements : (i) Metals will be found on the right side of the periodic table. (ii) The elements P, S and O belong to the same period. Which of these statement(s) is/are correct?
(a) (i) only
(b) (ii) only
(c) Both (i) and (ii)
(d) Neither (i) nor (ii)
Option d – Neither (i) nor (ii)
Which of the following elements show the given properties? (i) All elements are metals. (ii) Most of the elements form colored ions, and exhibit variable valence, and paramagnetism. (iii) Oftently used as catalysts.
(a) chalcogens
(b) transition elements
(c) Inner transition elements
(d) Representative elements
Option b – transition elements
Consider the following statements : (i) The elements silicon, germanium, and arsenic are called metalloids. (ii) Metalloids have properties quite different from those of metals and non-metals. Which of these statement(s) is/are correct?
(a) (i) only
(b) (ii) only
(c) Both (i) and (ii)
(d) Neither (i) nor (ii)
Option c – Both (i) and (ii)
The modern periodic table is based on the atomic number of elements. The experiment which proved the significance of the atomic number was
(a) Millikan’s oil drop experiment
(b) Mosley’s work on X-ray spectra
(c) Bragg’s work on X-ray diffraction
(d) the Discovery of X-rays by Rontgen
Option b – Mosley’s work on X-ray spectra
(a) (i) only
(b) (ii) only
(c) Both (i) and (ii)
(d) Neither (i) nor (ii)
Option c – Both (i) and (ii)
Consider the following statements with reference to the periodic table of chemical elements: 1. Ionisation potential gradually decreases along a period 2. In a group of elements, electron affinity decreases as the atomic weight increases 3. In a given period, electronegativity decreases as the atomic number increases Which of these statement (s) is/are correct?
(a) 1 only
(b) 2 only
(c) 1 and 3
(d) 2 and 3
Option b – 2 only
Select the correct chronological order for the discoveries of the following scientists. Dobereiner, Newlands, Chancourtois, Mendeleev
(a) Chancourtois, Dobereiner, Newlands, Mendeleev
(b) Dobereiner, Chancourtois, Newlands, Mendeleev
(c) Dobereiner, Newlands, Chancourtois, Mendeleev
(d) Chancourtois, Newlands, Dobereiner, Mendeleev
Option b – Dobereiner, Chancourtois, Newlands, Mendeleev
Which of the following statement(s) about the modern periodic table is/are incorrect? (i) The elements in the modern periodic table are arranged on the basis of their decreasing atomic number (ii) The elements in the modern periodic table are arranged on the basis of their increasing atomic masses (iii) Isotopes are placed in adjoining groups in the periodic table (iv) The elements in the modern periodic table are arranged on the basis of their increasing atomic number
(a) (i) only
(b) (i), (ii), and (iii)
(c) (i), (ii), and (iv)
(d) (iv) only
Option b – (i), (ii), and (iii)
The elements with atomic numbers 2, 10, 18, 36, 54, and 86 are all
(a) halogens
(b) noble gases
(c) noble metals
Option b – noble gases
Which one of the following properties changes with valency?
(a) Atomic weight
(b) Equivalent weight
(c) Molecular weight
(d) Density
Option b – Equivalent weight
The elements of a group in the periodic tabic
(a) have similar chemical properties
(b) have consecutive atomic numbers
(c) are isobars
(d) are isotopes
Option a – have similar chemical properties
Which one of the following is not a periodic property i.e., does not show any trend on moving from one side to the other in the periodic table?
(a) Atomic size
(b) Valency
(c) Radioactivity
(d) Electronegativity
Option c – Radioactivity
What is the correct increasing order of electronegativity for the most common oxidation states among the following elements?
(a) F<O<N<C
(b) C<N<C<F
(c) C<N< F<O
(d) C<N<O<F
Option d – C
The correct order of the increasing radii of the elements Na, Si, Al, and P is :
(a) Si, Al, P, Na
(b) Al, Si, P, Na
(c) P, Si, Al, Na
(d) Al, P, Si, Na
Option c – P, Si, Al, Na
According to Mendeleev’s periodic classification, the configuration of hydrogen atom resembles that electronic of alkali metals, which are given below as H = 1s’, Li=2s’, Na = 3s¹, K = 4s¹ other hand like halogens, hydrogen also exist as On the diatomic molecules, such as H₂, Cl₂, Br₂, I₂, etc. the basis of above information hydrogen can be placed On with
(a) Alkali metals
(b) Halogens
(c) Both (a) and (b)
(d) None of these
Option c – Both (a) and (b)
Elements A, B, C, and D have the same number of valence electrons. Their melting points are 458°K, 370°K, 525°K and 245°K respectively. Arrange the elements in increasing order of their atomic numbers.
(a) A<B<C<D
(b) C<A<B<D
(c) D<C<A<B
(d) B<D<A<C
Which of the following elements are found in pitchblende?
(a) Actinium and protoactinium
(b) Neptunium and plutonium
(c) Actinium only
(d) Both (a) and (b)
Option d – Both (a) and (b)
Which of the following statement(s) is/are incorrect? (i) Ionization enthalpy is expressed in units of kJmol-1. (ii) Ionization enthalpy is always positive. (iii) Second ionization enthalpy will be higher than the third ionization enthalpy.
(a) Only (ii)
(b) Only (iii)
(c) (ii) and (iii)
(d) None of these
Option b – Only (iii)
Which one of the following statements is incorrect?
(a) The greater the nuclear charge, the greater the electron affinity
(b) Nitrogen has zero electron affinity
(c) Electron affinity decreases from fluorine to iodine in the 17th group
(d) Chlorine has the highest electron affinity
Option c – Electron affinity decreases from fluorine to iodine in the 17th group
Which one of the following is an element?
(a) Topaz
(b) Diamond
(c) Ruby
(d) Sapphire
Option b – Diamond
Which of the following properties generally decrease along a period?
(a) Atomic size
(b) Non-metallic character
(c) Metallic character
(d) Both (a) and (c)
Option d – Both (a) and (c)
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