P,Q,R and S are metals in the same group in the Periodic Table but in periods 3,4, 5 and 6 respectively which of them loses electrons least readily? A P B C C R D S Answer is D Ace …
Given that the electronic configuration of an element X is 1s22s22p63s 23p4, it can be deduced that X A belongs to group VI in the Periodic Table B belongs to periodic Table C contains 3 unpaired electrons in the ground …
What is the mass number of an element if its atom contains 10 protons, 10 electrons and 12 neutrons? A 32 B 22 C 20 D 10 Answer is B Ace your next examination by joining our tutorial for that …
Allotropes of an element differ in their A physical properties B chemical properties C mass numbers D electronic configuration Answer is A Ace your next examination by joining our tutorial for that difficult subject. Click Here To Get Started. JOIN …
A plastic which cannot be softened by heat is described as A thermosetting B non-biodegradable C thermoplastic D malleable Answer is A Ace your next examination by joining our tutorial for that difficult subject. Click Here To Get Started. JOIN …
Biotechnology is applied in the following except A baking industry B wine production C production of antibiotics D manufacture of soap Answer is D Ace your next examination by joining our tutorial for that difficult subject. Click Here To Get …
If 20 cm3 of distilled water is added to 80 cm3 of 0.50 mol dm-3 hydrochloric acid, the concentration of the acid will change to A 20 mol dm-3 B 0.40 mol dm-3 C 2.00 mol dm-3 D 5.00 mol …
Which of the following on burning in air contributes to acid rain? A Sulphur B Magnesium C Aluminium D Zinc Answer is A Ace your next examination by joining our tutorial for that difficult subject. Click Here To Get Started. …
When sodium hydroxide solution is added to a solution of zinc salt, the white precipitate fromed redissolves in excess sodium hydroxide because A sodium is more reactive than zinc B sodium hydroxide is a strong alkali C zinc hydroxide is …
A colourless, odourless liquid T, gives effervesce with sodium trioxocarbonate (IV) and a white precipitate with silver trioxonitrate (V) solution T is mose probably A sodium chloride soluttion B barium chloride solution C dilute trioxonitrate (V) acid D dilute hydroxide …
Two-organic substances are labelled K and L if K gave a blue-black colour with iodine solution and L gave a deep red precipitate with Million’s reagent, it can be concluded that A K is a carbhydrate and L is a …
Which of the following needs to be hydrolysed before it shows reducing property? A Glucose B Maltose C Sucrose D Fructose Answer is C Ace your next examination by joining our tutorial for that difficult subject. Click Here To Get …
