Question
For which of the following ionic compounds no ion has octet? (a) LiH (b) CaO (c) NaCl (d) MgCl2
For which of the following ionic compounds no ion has octet? (a) LiH (b) CaO (c) NaCl (d) MgCl2
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Question
The order of oxidising properties of Cl (17), I(53), F(9), Br(35) belonging to group 17 of long periodic table is (a) F < Cl < Br < I (b) Cl > I > F > Br (c) Cl > F > Br > I (d) F > Cl > Br > I
The order of oxidising properties of Cl (17), I(53), F(9), Br(35) belonging to group 17 of long periodic table is (a) F…
Question
Number of groups in the long periodic table is (a) 9 (b) 13 (c) 18 (d) 19
Number of groups in the long periodic table is (a) 9 (b) 13 (c) 18 (d) 19
Question
If 12 C of charge flows through a conductor for 2 minutes, the electric current is
If 12 C of charge flows through a conductor for 2 minutes, the electric current is (a) 6 amperes (b) 0.1 amperes…
Question
If the resistance (R) of the conductor and time of flow of current in the conductor (t) remain unchanged, the relation between the heat produced (H) the conductor and flow of current (l) is
If the resistance (R) of the conductor and time of flow of current in the conductor (t) remain unchanged, the relation between…
Question
The charge of an electron is
The charge of an electron is (a) -3.2 × 10-19C (b) -1.6 × 10-19C (c) 6 × 10-19 C (d) 3.2 ×…
Question
Dentists use (a) convex mirror (b) convex lens (c) concave mirror (d) concave lens
Dentists use (a) convex mirror (b) convex lens (c) concave mirror (d) concave lens
Question
The wavelength of which of the following is greater than that of visible light?
The wavelength of which of the following is greater than that of visible light? (a) x-ray (b) infrared ray (c) γ –…
Question
If the radius of curvature of a concave mirror is 20 cm, then focal length of the mirror will be
If the radius of curvature of a concave mirror is 20 cm, then focal length of the mirror will be (a) 20…
Question
The relation between molecular mass (M) and vapour density (D) of gaseous substance is
The relation between molecular mass (M) and vapour density (D) of gaseous substance is (a) 2M=D (b) M=D2 (c) M=2.8D (d) M=2D