General Science and Ability

**When are day and night equal?**A) 23rd February and 21st SeptemberB) 21st March and 23rd SeptemberC) 23rd March and 21st SeptemberD) None of these Show Answer Correct Answer: B – 21st March and 23rd September

**Why is red light used in traffic signals for danger?**A) Due to short wavelengthB) Due to high frequencyC) It has long wavelength and high frequencyD) It has long wavelength and short frequency Show Answer Correct Answer: D – It has long wavelength and short frequency

**What is the total number of combinations of 9 things taken 3 at a time?**A) 18B) 27C) 48D) 84 Show Answer Correct Answer: D – 84

**Heavy water is:**A) Denoted by D2O and contains simple hydrogenB) Denoted by H2O and contains deuteriumC) Denoted by D2O and contains deuteriumD) Denoted by H2O and contains simple hydrogen Show Answer Correct Answer: C – Denoted by D2O and contains deuterium

**The chemical formula for alum is:**A) KAl(SO4)2·12H2OB) KSl(SO4)2·12H2OC) KAl(SO4)2·8H2OD) None of these Show Answer Correct Answer: A – KAl(SO4)2·12H2O

**The ionosphere is located within the thermosphere and extends:**A) From 60-300 km above the Earth’s surfaceB) From 50-200 km above the Earth’s surfaceC) From 50-300 km above the Earth’s surfaceD) None of these Show Answer Correct Answer: C – From 50-300 km above the Earth’s surface

**If the radius of a circle is increased three times, then its area is increased:**A) Three timesB) Six timesC) Nine timesD) None of these Show Answer Correct Answer: C – Nine times

**One degree of longitude on the equator is equal to a distance of:**A) 49 milesB) 69 milesC) 39 milesD) 60 miles Show Answer Correct Answer: B – 69 miles

**The protein molecule is made of:**A) AlkaloidsB) Short-range chain of amino acidsC) Long-range chain of amino acidsD) None of these Show Answer Correct Answer: C – Long-range chain of amino acids

**Which method may not be considered as a food preservation method?**A) FreezingB) IrradiationC) SaltingD) None of these Show Answer Correct Answer: D – None of these (Salting is a preservation method, so none of the options are incorrect)