An atom is the smallest particle of a substance. Chemical substances are divided into two major groups. They are 1. Pure Substances (and) 2. Mixtures.   There are two types of pure substances that are Elements and Compounds.   Elements : An element is a substance that is made up of only one kind of atoms and cannot be broken down into simpler substances by chemical means. Metals and Non- metals come under elements. Examples of elements are Iron, Silver, Gold, Mercury etc.   Compounds : A Compound is a substance that is formed when two or more elements combine chemically. Examples of compounds are Water, Carbon dioxide, methane, vinegar etc.   Mixtures : A Mixture is formed when two or more substances mixed together but not chemically combined. Example: Air.

Answer: A) 1, 5 – hexadiene Explanation: 3 – Hexanol: There is no alcohol stretch present in the spectrum. Therefore, the above structure is not suitable for the given spectrum.   Trans – 4 – octene: There is no vinyl bending present in the spectrum. Therefore, the above structure is not suitable for the given spectrum. 1, 5 – hexadiene: The vinyl bending and other stretches were matched with the above structure.     Hence, the c = c stretch, vinyl bending and stretch were matched with the above structure. Therefore, the given spectrum belongs to 1, 5 – hexadiene.

Answer: C) Jupiter Explanation: Jupiter has 67 natural satellites. Eight of Jupiter's moons are regular satellites, with 4 large, spherical moons, and 4 smaller moons that orbit closer to Jupiter. Jupiter has an additional 55 tiny irregular satellites.   The planet with the second highest number of moons is Saturn, with 61 moons. Earth has only one natural satellite i.e, Moon. Mercury and Venus have no satellites.

Answer: A) Iran Explanation:

Answer: A) 15 Explanation: Let number of hit shots be 'X'Let number of miss shots be 'Y'Given X + Y = 40....(1)50X - 10Y = 500.....(2)Solving 1 and 2, we getX = 15 and Y = 25Therefore, number of hits = 15

Answer: D) All the above Explanation: Some more NPP Acronym stands for  NPP New Patriotic Party NPP Nuclear Power Plant NPP Notice of Privacy Practices NPP Non-Physician Practitioner NPP New Progressive Party NPP National Patriotic Party NPP Notice of Proposed Procurement NPP Neighbourhood Police Post (Singapore) NPP Non-Paged Pool (memory) NPP Nurse Practitioner in Psychiatry.

Military Staffs normally follow four steps when preparing an effective briefing. They are:   1. Plan — analyze the situation and prepare a briefing outline. 2. Prepare — collect information and construct the briefing. 3. Execute — deliver the briefing. 4. Assess — follow up as required.

Answer: B) 63 Explanation: Here the series follows the pattern that, product of succesive prime numbers i.e,  2 × 3 = 6  3 × 5 = 15  5 × 7 = 35  7 × 11 = 77  11 × 13 = 143  13 × 17 = 221  17 × 19 = 323 So here in place of 77 the number 63 is written. So the wrong number is 63.