Answer: B) OH- Explanation: A conjugate acid, is a species formed by the reception of a proton (H+) by a base—in other words, it is a base with a hydrogen ion added to it. On the other hand, a conjugate base is what is left over after an acid has donated a proton during a chemical reaction. Hence, a conjugate base is a species formed by the removal of a proton from an acid. Because some acids are capable of releasing multiple protons, the conjugate base of an acid may itself be acidic. Represented as the following chemical reaction: Acid + Base ⇌ Conjugate Base + Conjugate Acid   The water molecule is the conjugate acid of the hydroxide ion after the latter received the hydrogen proton donated by ammonium. On the other hand, ammonia is the conjugate base for the acid ammonium after ammonium has donated a hydrogen ion towards the production of the water molecule. We can also refer to OH- as a conjugate base of H2O, since the water molecule donates a proton towards the production of NH+4 in the reverse reaction, which is the predominating process in nature due to the strength of the base NH3 over the hydroxide ion.

Answer: C) Tea Explanation: Makaibari is the world's first tea factory and was established in 1859 in Darjeeling, West Bengal.    It is most expensive tea in India which costs around 1.12 lakhs for 1 kg of tea.   Hence, Makaibari is the costliest variety of Tea.

Answer: B) 1 Explanation: The pattern follows the palindrome sequence. Here the digits 0 1 4 7 8 5 8 3 6 9    9 6 3 8 5 8 7 4 1 0   0 1 4 7 ... So the next digit in the sequence is 1.

Answer: A) 980 Explanation: The given series follows the pattern that,   ×5+5,   ×5+5,   ×5+5,   ×5+5,   ×5+5   38 x 5 + 5  = 195   195 x 5 + 5 = 980   980 x 5 + 5 = 4905   4905 x 5 + 5 = 24530   24530 x 5 + 5 = 122655   So the missing number is 980 .

Answer: D) Ravi Shastri Explanation: Former cricketer Ravi Shastri has been named the New coach of Team India on a Two year contract. This will be Shastri's second stint with the team, after being the director from 2014 - 2016.

Answer: A) 8 : 62.5 Explanation:                       Article I                   Article II                         -20                         25%                                        5%                         20%                       25%                                                4              :              5 Now, Selling of first article = (4-20%) = 0.8 Selling of second article = (5+25%) =  6.25 Therefore the ratio of selling price = 8 : 62.5

Answer: C) Rs. 30,000 Explanation: Let first part is 'K' and second part is 'L' then K + L = 50000---------eq1Total profit = profit on x + profit on y7000 = (K x 10 x 1)/100 + (L x 20 x 1)/10070000 = K + 2L-----------------------------------eq270000 = 50000 + Lso L = 20000 then K = 50000 - 20000 = 30000first part on 10% is = Rs.30000

Answer: D) Surat Explanation: Broadcaster Turner International India and Gujarat-based Rajgreen Group have entered into a brand partnership to set up India’s first Cartoon Network branded amusement park "Amaazia" in Surat, Gujarat. The park is expected to be operational by the first quarter of 2019 on a budget of Rs. 450 crore. It will spread across an area of 61,000 sq m and will have family entertainment destination with 33 theme-based attractions as well as 20 unique water-slides. It will be divided into four major sections – a theme park branded by Cartoon Network, a water park, a family recreational hub and a service apartment and retail shopping area. The park has been conceptualised and designed by the Sanderson Group, Australia. For Turner, this is the third such arrangement globally. It has a similar model in IMG Dubai and CN Amazone Water Park, in Thailand.