Questions in Grade High-school

Questions in Grade High-school

[Done] Which of the following is an extraneous solution of $(45-3 x)^{\frac{1}{2}}=x-9 ? A. $x=-12$ B. $x=-3$ C. $x=3$ D. $x=12$

[Done] 109. Identify the set of reagents that can effect bromination in benzene. (a) Bromine/Hydrogen bromide (b) Bromine/FeBr₃/H₂O (c) Bromine/FeBr₃ (d) Bromine/FeBr₂ 110. What is the reagent R in the reaction below? COCl | \ R -> CHO / (a) LiAlH₄ (b) LiAlH[O(CH₃)₃]₃ (c) NaBH₄ (d) H₂/Ni 111. Carboxylic acids have higher melting points compared to alcohols with the same number of carbon atoms because: (a) acids exhibit hydrogen bonding (b) acids have higher molecular weight (c) alcohols have polar character (d) alcohols usually occur as dimers 112. Identify Q in the reaction represented by the equation below: CONH₂ | \ Q -> NH₂ / (a) LiAlH₄ (b) KBr (c) KMnO₄ (d) NaNH₂ 113. Which of the following pairs of compounds will exhibit isomerism? (a) C₄H₁₀ and C₂H₅O (b) C₄H₁₀ and C₂H₆O (c) C₄H₁₀ and C₂H₅O₂ (d) C₄H₁₀ and C₆H₁₂ 114. An ester will not be formed when an alcohol is reacted with: (a) a carboxylic acid (b) an aldehyde (c) an acid anhydride (d) an acid chloride 115. Esters generally have lower boiling points than their corresponding carboxylic acids because: (a) they are volatile (b) they are associated (c) they are not associated (d) are non-volatile 116. Which of the following statement(s) is/are true of esters? (a) they are colourless liquids (b) they have a pleasant fruity odour (c) they are used for flavouring (d) all of the above 117. The reduction of esters to alcohols can be brought about by: (a) LiAlH₄/C₂H₅OH (b) LiAlH₄/(C₂H₅)₂O (c) NaBH₄/(C₂H₅)₂O (d) NaBH₄/C₂H₅OH

[Done] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Done] IV. Read the sentences carefully, put in the punctuations, and write A for assertive, I for imperative, In for interrogative, and Ex for exclamatory sentences at the end of each sentence. 1. Have you ever been to Kashmir? 2. What a beautiful place Kashmir is!

[Done] Some materials are given below: (i) Rubber (ii) Sugar (iii) Salt (iv) Cotton (v) Sponge (vi) Brick (vii) Talc powder (viii) Wood Identify the materials which are soft and insoluble in water. A. (i), (ii), (iii), (iv) and (vi) only B. (i), (iv), (v) and (vii) only C. (ii), (iii) and (viii) only D. (ii), (iii) and (vi) only

[Done] Your cousin Hao Long wants to make a healthy lunch. He asks you for advice on what he should make. Write an email to Hao Long. In your email, tell Hao Long: • what dish he should make? • why it is healthy • what ingredients he needs Write about 30-50 words. Write your email below.

[Done] From the following information calculate any two of the following ratios: (i) Net Profit Ratio (ii) Debt Equity Ratio (iii) Quick Ratio. Information: Paid up Capital ₹20,00,000 Capital Reserve ₹2,00,000 9% Debentures ₹8,00,000 Revenue from Operations ₹14,00,000 Gross Profit ₹8,00,000 Indirect Expenses ₹2,00,000 Current Assets ₹4,00,000 Current Liabilities ₹3,00,000 Opening Inventory ₹50,000 Closing Inventory 20% more than opening Inventory.

[Done] You have three potential solutions: 1. An abandoned and rundown warehouse, located 3 blocks away, offers 1000m² of space at a rate of R15 per m² per month for a year. The estimated cost of renovating this warehouse is R239,000.00. 2. A fully equipped bonded storage facility of 1200m² is available at R25 per m², also for a year. Transport costs will be R530 per load of 10 pallets. 3. Another warehouse, situated 2 blocks away, has an immediately available space of 400m². Setting it up as a bonded store will cost R127,000.00 and take three days. Currently, 350m² of space is occupied by freight in bond at your existing premises. Moving this stock will take one day and cost R27,750.00. Both Options 1 and 2 require four weeks (28 days) before any stock can be stored, with a demurrage charge of R19.24 per pallet per day. Task 1: Working in groups of six (6), your task is to carefully evaluate these options and justify your decision in a report to management.

[Done] From the following particulars, construct a sales ledger adjustment account as it will appear in the nominal ledger of a business: Balances on 30.6.22 (Dr.): 65,290 Balances on 30.6.22 (Cr.): 250 Sales as per sales day book: 120,500 Sales as per cash book: 10,000 Purchases as per purchase day book: 75,300 Purchases as per cash book: 5,000 Cash received from debtors as per cash book: 89,730 Bills receivable as per bill book: 20,500 Bills receivable dishonoured as per bill book: 3,500 Bills receivable discounted as per bill book: 7,800 Returns as per returns inward day book: 5,700 Discounts allowed as per cash book: 4,200 Trade discount allowed: 300 Credit balance on 31.12.22: 340

[Done] Mr. Salas allotted a 5 m by 5 m space in his lot for his garden. He wanted to make it bigger. He added 1 m more on one of its sides to make it 6 m by 5 m. How large was the increase in the garden? A = L x W A = 5 m x 5 m = 25 m² A = 6 m x 5 m = 30 m²