abhinaysingh525 Which of the following metals is not strong? (A) Sodium (B) Gold (C) Silver (D) Iron Answer: (A) Sodium More Question Question: The best malleable metal is – (A) Aluminum (B) Silver (C) Gold (D) Lead Answer Question: The early attempt to classify elements as metals and non-metals was made by – (A) Mendeleev (B) … Read more
The device used for producing electric current is called – (A) Generator (B) Galvanometer (C) Ammeter (D) Motor Answer: (A) Generator More Question Question: The best malleable metal is – (A) Aluminum (B) Silver (C) Gold (D) Lead Answer Question: The early attempt to classify elements as metals and non-metals was made by – (A) … Read more
Sun derives its energy from – (A) The fusion of hydrogen nuclei into helium nuclei (B) The fusion of helium nuclei into hydrogen nuclei (C) The fission of hydrogen nuclei (D) The fission of helium nuclei Answer: (A) The fusion of hydrogen nuclei into helium nuclei More Question Question: The best malleable metal is – … Read more
Find the Missing Number 7426, 9782, 6366, 524? Solutions: 7*6=42 9*8=72 6*6=36 5*4=20
Can You Solve This 2+10=24, 3+6=27, 7+2=63, 5+3=? Solutions: 2 + 10 = 24 => 2 + 10 = 12 x 2 = 24 3 + 6 = 27 => 3 + 6 = 9 x 3 = 27 7 + 2 = 63 = 7 + 2 = 9 x 7 = 63 Similarly, … Read more
A neutral atom (Atomic no. >1 ) consists of (a) Only protons (b) Neutrons + protons (c) Neutrons + electrons (d) Neutron + proton + electron Answer: (d) Neutrons and protons in the nucleus and electrons in the extranuclear region.
The nucleus of the atom consists of (a) Proton and neutron (b) Proton and electron (c) Neutron and electron (d) Proton, neutron and electron Answer: (a) It consists of proton and neutron and these are also known as nucleons.
The size of nucleus is of the order of (a) 10^(-12)m (b) 10^(-8) m (c) 10^(-15)m (d) 10^(-10) m Answer: (c) Radius of nucleus ≃10^(-15)m.
Positive ions are formed from the neutral atom by the (a) Increase of nuclear charge (b) Gain of protons (c) Loss of electrons (d) Loss of protons Answer: (c) Positive ions are formed from the neutral atom by the loss of electrons.
The electron is (a) α-ray particle (b) β-ray particle (c) Hydrogen ion (d) Positron Answer: (b) The β-ray particle constitutes electrons.